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.

A296740 Expansion of e.g.f. sec(x*cosh(x)) (even powers only).

Table of values

n a(n)
0 1
1 1
2 17
3 481
4 26529
5 2355841
6 304490801
7 54346519137
8 12784369495873
9 3834072115634689
10 1427927160049839185
11 646549058811594306017
12 349778819738933516544737
13 222822626689237030117683841
14 165094750167986500169166495089
15 140768231241374238855897822250081

List of values

[1, 1, 17, 481, 26529, 2355841, 304490801, 54346519137, 12784369495873, 3834072115634689, 1427927160049839185, 646549058811594306017, 349778819738933516544737, 222822626689237030117683841, 165094750167986500169166495089, 140768231241374238855897822250081]

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

Content is available under The OEIS End-User License Agreement.