Memer Array Notation (MAN) is the dumbest array notation made by googology wiki user HaydenTheGoogologist2009. It's expermental and ill-defined.
Use m?/a,b,c,...n/ as the array format
m?// = 69
m?/a/ = 69^a where a >= 1
m?/#,1/ = m?/#/ where # represents the rest of the array (a string of entries and commas, it can also be empty)
m?/a,1,#/ = a where a >=1
m?/a,b,1,1,1,...,1,2/ (number of 1's >= 1, let c be the number of 1's) = m?/a,a,a,...,a, m?/a,b-1,1,1,1,...,1,c#/,c-1#/ (b a's, c 1's) where a, b > 1, c >= 1
m?/a,b,c#/ = m?/a, m?/a,b-1,c#/,c-1#/
If there are two or more distinct rules to apply to a single expression, the uppermost-numbered rule which is applicable and whose result is a valid expression will be applied.
Reuse the rules for linear arrays to that row (after separators other than commas)
m?/a,b<2>c/ = m?/a,a,1,1,1,...,1,1,2<2>c-1/ with b string of 1's using comma as a separator.
m?/a,b<2>1<2>...<2>1<2>c/ = m?/a,a<2>1<2>...<2>1,1,1,...,1,1,2<2>c-1/ with b string of 1's using comma as a separator.
m?/a,b<d>1<d>...<d>1<d>c/ = m?/a,a<d-1>1<d-1>...<d-1>1, 1, 1, ..., 1, 1, 2<d-1>c-1/ with b string of 1's using <d-1> as a separator.
m?/a,b<1,1,1,...,1,1,c,d%>2/ = m?/a,a<1,1,1,...,1,b,c-1,d%>2/
m?/a,b<1<2>c> 2/ = m?/a, a<1,1,1,...,1,1,2<2>c-1>2/
Now, let's define another function.
f(x) = m?/69,69<1<1<1...<2>...2>2>2>2/ (x 1's)
m?/x,,2/ = f(x)
m?/a,,b> = f(m?/a,,b-1/) for q > 1
m?/a,,,2/ = m?/a,,a,,1,,1,,1,,...,,1,,1,,2/ with a string of 1's using double comma as a separator.
m?/a,,,,2/ = m?/a,,,a,,,1,,,1,,,1,,,...,1,,,1,,,2/ with a string of 1's using triple comma as a separator.
n§ = m?/69,,,...,,,69/ with n commas
m?/aX2/ = n§
m?/aXb/ = (m?/aXb-1/)§ for q > 1
m?/aXX2> = m?/aX1X1X1X1X...X1X1X2/ with a string of 1's using X as a separator.
We can even do m?/pXXX...XXXq/ with finitely many X's, and that's the limit of the notation.