cp's OEIS Frontend

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.

A271762 Number of set partitions of [n] with minimal block length multiplicity equal to two.

Table of values

n a(n)
2 1
3 0
4 3
5 0
6 55
7 105
8 945
9 1218
10 15456
11 26785
12 705573
13 2502786
14 32988670
15 169561483
16 1757881723
17 10231748010
18 84389906941
19 540218433147
20 6899156019034
21 41756989590256
22 554960234199955
23 4793361957432730
24 59690079139252499
25 558283841454550850
26 7093218105977514525

List of values

[1, 0, 3, 0, 55, 105, 945, 1218, 15456, 26785, 705573, 2502786, 32988670, 169561483, 1757881723, 10231748010, 84389906941, 540218433147, 6899156019034, 41756989590256, 554960234199955, 4793361957432730, 59690079139252499, 558283841454550850, 7093218105977514525]

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

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