201349

Appears in sequences

• Numbers k that divide the (left) concatenation of all numbers <= k written in base 13 (most significant digit on left).at n=27A029482
• G.f.: 1/(1 - x/(1 - x^3/(1 - x^6/(1 - x^10/(1 - x^15/(1 - x^21/(1 -...- x^(n*(n+1)/2)/(1 -...))))))), a continued fraction.at n=33A206740