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.

A089677 Exponential convolution of A000670(n), with A000670(0)=0, with the sequence of all ones alternating in sign.

Table of values

n a(n)
0 0
1 1
2 1
3 7
4 37
5 271
6 2341
7 23647
8 272917
9 3543631
10 51123781
11 811316287
12 14045783797
13 263429174191
14 5320671485221
15 115141595488927
16 2657827340990677
17 65185383514567951
18 1692767331628422661
19 46400793659664205567
20 1338843898122192101557

List of values

[0, 1, 1, 7, 37, 271, 2341, 23647, 272917, 3543631, 51123781, 811316287, 14045783797, 263429174191, 5320671485221, 115141595488927, 2657827340990677, 65185383514567951, 1692767331628422661, 46400793659664205567, 1338843898122192101557]

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

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