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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.

A003702 Expansion of tan(x)/cosh(x).

Table of values

n a(n)
0 1
1 -1
2 21
3 -141
4 10441
5 -183481
6 29429661
7 -987318021
8 276117553681
9 -15085947275761
10 6514632269358501
11 -526614587249608701
12 324871912636292700121
13 -36433570919762397948841
14 30417659816002454665514541

List of values

[1, -1, 21, -141, 10441, -183481, 29429661, -987318021, 276117553681, -15085947275761, 6514632269358501, -526614587249608701, 324871912636292700121, -36433570919762397948841, 30417659816002454665514541]

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

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