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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.

A330516 Expansion of e.g.f. Product_{k>=1} sec(x^k) (even powers only).

Table of values

n a(n)
0 1
1 1
2 17
3 601
4 44225
5 4589041
6 781157585
7 162882093193
8 48519650017025
9 17223202538504161
10 7898449818361655825
11 4193448664548573675961
12 2779065418077990268214465
13 2061320859693223620523895761
14 1836094285018667246330440863185

List of values

[1, 1, 17, 601, 44225, 4589041, 781157585, 162882093193, 48519650017025, 17223202538504161, 7898449818361655825, 4193448664548573675961, 2779065418077990268214465, 2061320859693223620523895761, 1836094285018667246330440863185]

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

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