The 15 is here numbers

Introduction

Since Googology Wiki turned 15 years old recently, I decided to coin numbers based on number 15 and some multiples of 15 numbers (30, 45, 60, 75, 90, etc.) here.

Note: f_x(n) is fast-growing hierarchy. Wainer hierarchy, Veblen function, Buchholz's psi function is used in FGH.

All BMS numbers are defined with respect to version 4, simulating Hardy hierarchy.

Numbers in this series