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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.

A322277 Permanent of an n X n square matrix M(n) formed by writing the numbers 1, ..., n^2 successively forward and backward along the rows in zig-zag pattern.

Table of values

n a(n)
1 1
2 11
3 490
4 60916
5 15745548
6 7477647372
7 5799397213200
8 6925325038489152
9 11958227405868674880
10 28853103567727115409600
11 93561657023119005869616000
12 398720531811315564754326938880
13 2174628314166392755825875267321600
14 14941853448103858870808931238617312000

List of values

[1, 11, 490, 60916, 15745548, 7477647372, 5799397213200, 6925325038489152, 11958227405868674880, 28853103567727115409600, 93561657023119005869616000, 398720531811315564754326938880, 2174628314166392755825875267321600, 14941853448103858870808931238617312000]

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

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