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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.

A002735 Related to Euler numbers, expansion of e.g.f. sec(x)*tan^2(x).

Table of values

n a(n)
1 4
2 14
3 56
4 331
5 1324
6 12284
7 49136
8 663061
9 2652244
10 49164554
11 196658216
12 4798037791
13 19192151164
14 596372040824
15 2385488163296
16 91991577140521
17 367966308562084
18 17244625801225094
19 68978503204900376
20 3861296322290987251

List of values

[4, 14, 56, 331, 1324, 12284, 49136, 663061, 2652244, 49164554, 196658216, 4798037791, 19192151164, 596372040824, 2385488163296, 91991577140521, 367966308562084, 17244625801225094, 68978503204900376, 3861296322290987251]

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

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