21325
domain: N
Appears in sequences
- Base-8 palindromes that start with 5.at n=31A043025
- a(n) = n*x^n + (n-1)*x^(n-1) + . . . + x + 1 for x=3.at n=7A088581
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 0, -1), (1, 1, 1)}.at n=8A149758
- (n^3 - n + 15)/3.at n=39A155757
- a(n) = decimal equivalent of A215254(n).at n=14A215253
- E.g.f.: Sum_{n>=0} (exp(n*x) + 1)^n / (2 + exp(n*x))^(n+1).at n=4A302700