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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.

A375597 Triangle read by rows: T(n, k) = n! * 3^k * hypergeom([-k], [-n], -2/3).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 4
5 10
6 6
7 14
8 34
9 82
10 24
11 60
12 152
13 388
14 1000
15 120
16 312
17 816
18 2144
19 5656
20 14968
21 720
22 1920
23 5136
24 13776
25 37040
26 99808
27 269488
28 5040
29 13680
30 37200
31 101328
32 276432
33 755216
34 2066032
35 5659120
36 40320
37 110880
38 305280
39 841440
40 2321664
41 6412128
42 17725952
43 49045792
44 135819136

List of values

[1, 1, 1, 2, 4, 10, 6, 14, 34, 82, 24, 60, 152, 388, 1000, 120, 312, 816, 2144, 5656, 14968, 720, 1920, 5136, 13776, 37040, 99808, 269488, 5040, 13680, 37200, 101328, 276432, 755216, 2066032, 5659120, 40320, 110880, 305280, 841440, 2321664, 6412128, 17725952, 49045792, 135819136]

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

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