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.

A270958 Number of set partitions of [n] having exactly four pairs (m,m+1) such that m+1 is in some block b and m is in block b+1.

Table of values

n a(n)
8 10
9 174
10 1783
11 15158
12 121464
13 965616
14 7776877
15 64017975
16 540759958
17 4695640591
18 41947390960
19 385584558062
20 3646493831801
21 35466401895010
22 354594794206614
23 3642294128252241
24 38413175987708429
25 415694601586123128
26 4612983463942832627
27 52460139965678764835

List of values

[10, 174, 1783, 15158, 121464, 965616, 7776877, 64017975, 540759958, 4695640591, 41947390960, 385584558062, 3646493831801, 35466401895010, 354594794206614, 3642294128252241, 38413175987708429, 415694601586123128, 4612983463942832627, 52460139965678764835]

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

Content is available under The OEIS End-User License Agreement.