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.

A370286 Coefficient of x^n in the expansion of ( (1+x)^3 + x^2 )^n.

Table of values

n a(n)
0 1
1 3
2 17
3 102
4 645
5 4193
6 27764
7 186231
8 1261213
9 8604759
10 59053167
11 407217396
12 2819252544
13 19583729766
14 136426565999
15 952743556907
16 6667916884701
17 46755146944959
18 328398159653117
19 2310073990369926
20 16271915501598595
21 114757849228310355

List of values

[1, 3, 17, 102, 645, 4193, 27764, 186231, 1261213, 8604759, 59053167, 407217396, 2819252544, 19583729766, 136426565999, 952743556907, 6667916884701, 46755146944959, 328398159653117, 2310073990369926, 16271915501598595, 114757849228310355]

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

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