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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.

A000708 a(n) = E(n+1) - 2*E(n), where E(i) is the Euler number A000111(i).

Table of values

n a(n)
0 -1
1 -1
2 0
3 1
4 6
5 29
6 150
7 841
8 5166
9 34649
10 252750
11 1995181
12 16962726
13 154624469
14 1505035350
15 15583997521
16 171082318686
17 1985148989489
18 24279125761950
19 312193418011861
20 4210755676649046
21 59445878286889709
22 876726137720576550
23 13483686390543382201

List of values

[-1, -1, 0, 1, 6, 29, 150, 841, 5166, 34649, 252750, 1995181, 16962726, 154624469, 1505035350, 15583997521, 171082318686, 1985148989489, 24279125761950, 312193418011861, 4210755676649046, 59445878286889709, 876726137720576550, 13483686390543382201]

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

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