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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.

A327508 Number of set partitions of [n] where each subset is again partitioned into seven nonempty subsets.

Table of values

n a(n)
0 1
1 0
2 0
3 0
4 0
5 0
6 0
7 1
8 28
9 462
10 5880
11 63987
12 627396
13 5715424
14 49330996
15 408921513
16 3292212924
17 26136933186
18 211891946448
19 1910903676319
20 21958686224932
21 338516695449108
22 6257281367040396
23 122152192372692405
24 2369188918134769500
25 44783158458575933110

List of values

[1, 0, 0, 0, 0, 0, 0, 1, 28, 462, 5880, 63987, 627396, 5715424, 49330996, 408921513, 3292212924, 26136933186, 211891946448, 1910903676319, 21958686224932, 338516695449108, 6257281367040396, 122152192372692405, 2369188918134769500, 44783158458575933110]

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

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