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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.

A128554 Column 4 of triangle A128545; a(n) is the coefficient of q^(4n+16) in the central q-binomial coefficient [2n+8,n+4].

Table of values

n a(n)
0 1
1 7
2 39
3 155
4 526
5 1555
6 4192
7 10465
8 24620
9 55038
10 117966
11 243723
12 487842
13 949446
14 1802547
15 3346632
16 6089910
17 10881277
18 19121293
19 33091141
20 56466398
21 95105255
22 158256685
23 260386761
24 423932473
25 683409993
26 1091521679
27 1728156294

List of values

[1, 7, 39, 155, 526, 1555, 4192, 10465, 24620, 55038, 117966, 243723, 487842, 949446, 1802547, 3346632, 6089910, 10881277, 19121293, 33091141, 56466398, 95105255, 158256685, 260386761, 423932473, 683409993, 1091521679, 1728156294]

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

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