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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.

A375613 Triangle read by rows: T(n, k) = n! * 4^k * hypergeom([-k], [-n], 1/4).

Table of values

n a(n)
0 1
1 1
2 5
3 2
4 9
5 41
6 6
7 26
8 113
9 493
10 24
11 102
12 434
13 1849
14 7889
15 120
16 504
17 2118
18 8906
19 37473
20 157781
21 720
22 3000
23 12504
24 52134
25 217442
26 907241
27 3786745
28 5040
29 20880
30 86520
31 358584
32 1486470
33 6163322
34 25560529
35 106028861
36 40320
37 166320
38 686160
39 2831160
40 11683224
41 48219366
42 199040786
43 821723673
44 3392923553

List of values

[1, 1, 5, 2, 9, 41, 6, 26, 113, 493, 24, 102, 434, 1849, 7889, 120, 504, 2118, 8906, 37473, 157781, 720, 3000, 12504, 52134, 217442, 907241, 3786745, 5040, 20880, 86520, 358584, 1486470, 6163322, 25560529, 106028861, 40320, 166320, 686160, 2831160, 11683224, 48219366, 199040786, 821723673, 3392923553]

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

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