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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.

A139134 a(n) = n-th derivative of Sec(Exp(z)-1) at z=0.

Table of values

n a(n)
0 1
1 0
2 1
3 3
4 12
5 65
6 417
7 3094
8 26243
9 250371
10 2652754
11 30910935
12 392895789
13 5409783392
14 80214503397
15 1274329677391
16 21594115259540
17 388790596531173
18 7411710847692157
19 149142571391245758
20 3159081458947418511

List of values

[1, 0, 1, 3, 12, 65, 417, 3094, 26243, 250371, 2652754, 30910935, 392895789, 5409783392, 80214503397, 1274329677391, 21594115259540, 388790596531173, 7411710847692157, 149142571391245758, 3159081458947418511]

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

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