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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.

A327828 Sum of multinomials M(n; lambda), where lambda ranges over all partitions of n into parts incorporating 2.

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 18
5 100
6 705
7 5166
8 44856
9 413316
10 4297635
11 47906650
12 586050828
13 7669704978
14 108433645502
15 1632017808435
16 26240224612920
17 446861879976600
18 8063224431751719
19 153335328111105282
20 3070484092409318100
21 64508501542986638550
22 1420061287311444508962

List of values

[0, 0, 1, 3, 18, 100, 705, 5166, 44856, 413316, 4297635, 47906650, 586050828, 7669704978, 108433645502, 1632017808435, 26240224612920, 446861879976600, 8063224431751719, 153335328111105282, 3070484092409318100, 64508501542986638550, 1420061287311444508962]

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

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