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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.

A270768 Total sum of the sizes of all blocks with minimal element 5 in all set partitions of {1,2,...,n}.

Table of values

n a(n)
5 15
6 82
7 456
8 2623
9 15717
10 98367
11 643401
12 4395802
13 31336468
14 232773295
15 1799100571
16 14446912419
17 120354176611
18 1038736540222
19 9275288018740
20 85580969753059
21 814958928731237
22 8000443830761623
23 80882083469431805
24 841236045441243662
25 8992982601018855952

List of values

[15, 82, 456, 2623, 15717, 98367, 643401, 4395802, 31336468, 232773295, 1799100571, 14446912419, 120354176611, 1038736540222, 9275288018740, 85580969753059, 814958928731237, 8000443830761623, 80882083469431805, 841236045441243662, 8992982601018855952]

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

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