Links

https://en.wikipedia.org/wiki/Triangular_number

1,3,6,10,15,21,...

https://en.wikipedia.org/wiki/Taylor_series

https://en.wikipedia.org/wiki/Complex_number

a + b i

https://en.wikipedia.org/wiki/Complex_analysis

https://en.wikipedia.org/wiki/Continued_fraction

 https://mathoverflow.net/users/80790/mick

Some interesting questions of myself that my friend posted ...

https://mathoverflow.net/questions/219428/asymptotics-to-taylor-expansions

... such as this one.

What is related to " fake function theory " ( what I talk about here ; link on the left )

https://www.schaakclub-okelly.be/

my local chess club.

http://en.wikipedia.org/wiki/Gothic_Chess

 A cool board game.

https://www.chessvariants.com/

" many " boards games.

http://mathworld.wolfram.com/PowerTower.html

 https://en.wikipedia.org/wiki/Tetration

Two links you might want to look at before you read about " tetration " ( what I talk about here ; link in the left )

http://math.eretrandre.org/tetrationforum/index.php

http://math.eretrandre.org/tetrationforum/member.php?action=profile&uid=47

 https://tetration.org/index.php/Main_Page

https://tetrationforum.org/member.php?action=profile&uid=47

my profile at the tetration forum.

http://en.wikipedia.org/wiki/Lucky_number

http://en.wikipedia.org/wiki/Prime_twins

http://arxiv.org/

http://mathoverflow.net/

btw

I made a specific page for links to integer sequences :  see " OEIS integer sequences "