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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.

A278927 a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = 2*i + j.

Table of values

n a(n)
0 1
1 3
2 38
3 1116
4 59392
5 5004720
6 613252320
7 103050420480
8 22752244279296
9 6388491978086400
10 2223423557203968000
11 939489529945565491200
12 473789563269835667374080
13 281112352557447776249364480
14 193857685859605294233907200000
15 153758529080702011472247521280000

List of values

[1, 3, 38, 1116, 59392, 5004720, 613252320, 103050420480, 22752244279296, 6388491978086400, 2223423557203968000, 939489529945565491200, 473789563269835667374080, 281112352557447776249364480, 193857685859605294233907200000, 153758529080702011472247521280000]

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

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