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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.

A241171 Triangle read by rows: Joffe's central differences of zero, T(n,k), 1 <= k <= n.

Table of values

n a(n)
1 1
2 1
3 6
4 1
5 30
6 90
7 1
8 126
9 1260
10 2520
11 1
12 510
13 13230
14 75600
15 113400
16 1
17 2046
18 126720
19 1580040
20 6237000
21 7484400
22 1
23 8190
24 1171170
25 28828800
26 227026800
27 681080400
28 681080400
29 1
30 32766
31 10663380
32 494053560
33 6972966000
34 39502663200
35 95351256000
36 81729648000
37 1
38 131070
39 96461910
40 8203431600
41 196556560200
42 1882311631200
43 8266953895200
44 16672848192000
45 12504636144000

List of values

[1, 1, 6, 1, 30, 90, 1, 126, 1260, 2520, 1, 510, 13230, 75600, 113400, 1, 2046, 126720, 1580040, 6237000, 7484400, 1, 8190, 1171170, 28828800, 227026800, 681080400, 681080400, 1, 32766, 10663380, 494053560, 6972966000, 39502663200, 95351256000, 81729648000, 1, 131070, 96461910, 8203431600, 196556560200, 1882311631200, 8266953895200, 16672848192000, 12504636144000]

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

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