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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.

A285366 Sum of the entries in the fourth blocks of all set partitions of [n].

Table of values

n a(n)
4 4
5 55
6 495
7 3757
8 26421
9 180482
10 1230737
11 8520912
12 60531347
13 444006008
14 3374292280
15 26605751388
16 217686862402
17 1847108846441
18 16237616979723
19 147709622593855
20 1388722474550671
21 13477574785475778
22 134861358322272607
23 1389822348657508142
24 14735739124218384875

List of values

[4, 55, 495, 3757, 26421, 180482, 1230737, 8520912, 60531347, 444006008, 3374292280, 26605751388, 217686862402, 1847108846441, 16237616979723, 147709622593855, 1388722474550671, 13477574785475778, 134861358322272607, 1389822348657508142, 14735739124218384875]

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

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