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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.

A377659 a(n) = Motzkin(n) - 2^(n - 1 + 0^n) = A001006(n) - A011782(n).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 5
6 19
7 63
8 195
9 579
10 1676
11 4774
12 13463
13 37739
14 105442
15 294188
16 820699
17 2291243
18 6405310
19 17937140
20 50327731
21 141498983
22 398666071
23 1125566111
24 3184339189
25 9026625285
26 25636264044
27 72940663938
28 207889060481
29 593474349373
30 1696848600299
31 4858687934567

List of values

[0, 0, 0, 0, 1, 5, 19, 63, 195, 579, 1676, 4774, 13463, 37739, 105442, 294188, 820699, 2291243, 6405310, 17937140, 50327731, 141498983, 398666071, 1125566111, 3184339189, 9026625285, 25636264044, 72940663938, 207889060481, 593474349373, 1696848600299, 4858687934567]

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

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