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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.

A361732 a(n) = [x^n] (x^5 + 5*x^4 + 4*x^3 - 3*x + 1)/(x^2 + 2*x - 1)^2.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 20
5 60
6 174
7 490
8 1352
9 3672
10 9850
11 26158
12 68892
13 180180
14 468454
15 1211730
16 3120400
17 8004144
18 20460402
19 52139990
20 132502180
21 335882988
22 849507230
23 2144114234
24 5401408344
25 13583493000
26 34105191146
27 85504030974
28 214070361260
29 535269125508
30 1336814464470

List of values

[1, 1, 2, 6, 20, 60, 174, 490, 1352, 3672, 9850, 26158, 68892, 180180, 468454, 1211730, 3120400, 8004144, 20460402, 52139990, 132502180, 335882988, 849507230, 2144114234, 5401408344, 13583493000, 34105191146, 85504030974, 214070361260, 535269125508, 1336814464470]

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

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