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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.

A386975 a(n) is the permanent of the n X n matrix M_n with M_n(j,k) = j for j <> k, M_n(j,k) = n+j for j = k.

Table of values

n a(n)
0 1
1 2
2 14
3 183
4 3792
5 114780
6 4807728
7 267380071
8 19098388480
9 1705287529422
10 186174804704000
11 24402257980061599
12 3781731531452940288
13 684046276855242721368
14 142823583210894978115584
15 34092816821609506532859375
16 9226267072346511233190461440
17 2809774286001810901571097532538

List of values

[1, 2, 14, 183, 3792, 114780, 4807728, 267380071, 19098388480, 1705287529422, 186174804704000, 24402257980061599, 3781731531452940288, 684046276855242721368, 142823583210894978115584, 34092816821609506532859375, 9226267072346511233190461440, 2809774286001810901571097532538]

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

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