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.

A370625 Coefficient of x^n in the expansion of ( (1-x) / (1-x-x^3) )^n.

Table of values

n a(n)
0 1
1 0
2 0
3 3
4 4
5 5
6 27
7 63
8 116
9 354
10 945
11 2123
12 5563
13 14846
14 36519
15 93083
16 244068
17 622013
18 1590318
19 4131265
20 10658969
21 27440808
22 71127683
23 184324461
24 476969939
25 1237420755
26 3213687698
27 8343223779
28 21682184311
29 56400917786
30 146742491187
31 381991981659

List of values

[1, 0, 0, 3, 4, 5, 27, 63, 116, 354, 945, 2123, 5563, 14846, 36519, 93083, 244068, 622013, 1590318, 4131265, 10658969, 27440808, 71127683, 184324461, 476969939, 1237420755, 3213687698, 8343223779, 21682184311, 56400917786, 146742491187, 381991981659]

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

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