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.

A320555 Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most five elements and for at least one block c the smallest integer interval containing c has exactly five elements.

Table of values

n a(n)
5 15
6 64
7 201
8 585
9 1741
10 5375
11 16355
12 48601
13 141921
14 410425
15 1182828
16 3398411
17 9728692
18 27745449
19 78861484
20 223573925
21 632578393
22 1786856056
23 5039984789
24 14197033194
25 39945491361
26 112282665839
27 315352029653
28 885048266680
29 2482371076351
30 6958712870273

List of values

[15, 64, 201, 585, 1741, 5375, 16355, 48601, 141921, 410425, 1182828, 3398411, 9728692, 27745449, 78861484, 223573925, 632578393, 1786856056, 5039984789, 14197033194, 39945491361, 112282665839, 315352029653, 885048266680, 2482371076351, 6958712870273]

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

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