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.

A305710 Expansion of e.g.f. exp(sec(x)*exp(x) - 1).

Table of values

n a(n)
0 1
1 1
2 3
3 11
4 53
5 297
6 1959
7 14499
8 120409
9 1097025
10 10931771
11 117685163
12 1363889133
13 16887554569
14 222672557631
15 3110742121059
16 45912214062961
17 713290136581697
18 11636755988405555
19 198800967493444875
20 3549276499518132325
21 66076184834921382313
22 1280502976522048458647

List of values

[1, 1, 3, 11, 53, 297, 1959, 14499, 120409, 1097025, 10931771, 117685163, 1363889133, 16887554569, 222672557631, 3110742121059, 45912214062961, 713290136581697, 11636755988405555, 198800967493444875, 3549276499518132325, 66076184834921382313, 1280502976522048458647]

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

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