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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.

A374980 Number of multiset permutations of {1, 1, 2, 2, ..., n, n} with no fixed pair (j,j).

Table of values

n a(n)
0 1
1 0
2 5
3 74
4 2193
5 101644
6 6840085
7 630985830
8 76484389121
9 11792973495032
10 2254432154097861
11 523368281765512930
12 145044815855963403985
13 47302856057098946329284
14 17933275902554972391519893
15 7820842217155394547769452734
16 3887745712142302082441578104705

List of values

[1, 0, 5, 74, 2193, 101644, 6840085, 630985830, 76484389121, 11792973495032, 2254432154097861, 523368281765512930, 145044815855963403985, 47302856057098946329284, 17933275902554972391519893, 7820842217155394547769452734, 3887745712142302082441578104705]

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

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