cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A145075 Coefficient of x^(5^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} (x^(5^k) + x^(2*5^k) + x^(3*5^k) + x^(4*5^k)).

Table of values

n a(n)
0 1
1 4
2 18
3 172
4 1881
5 25644
6 411488
7 7581792
8 157296141
9 3630709734
10 92225760033
11 2556393882912
12 76774488792326
13 2483261807354874

List of values

[1, 4, 18, 172, 1881, 25644, 411488, 7581792, 157296141, 3630709734, 92225760033, 2556393882912, 76774488792326, 2483261807354874]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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