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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.

A192441 Coefficient of x^(2*n) in the expansion of (1 + x^3 + x^4)^n.

Table of values

n a(n)
0 1
1 0
2 2
3 3
4 6
5 30
6 35
7 210
8 350
9 1344
10 3402
11 9240
12 29139
13 72072
14 231660
15 603603
16 1814670
17 5095376
18 14507324
19 42401502
20 118974466
21 349305120
22 990073812
23 2877816304
24 8272748675
25 23852438880
26 69116072950
27 198980348385
28 577566713520
29 1667118322590
30 4834810467135

List of values

[1, 0, 2, 3, 6, 30, 35, 210, 350, 1344, 3402, 9240, 29139, 72072, 231660, 603603, 1814670, 5095376, 14507324, 42401502, 118974466, 349305120, 990073812, 2877816304, 8272748675, 23852438880, 69116072950, 198980348385, 577566713520, 1667118322590, 4834810467135]

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

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