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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.

A189179 Number of n X 2 array permutations with each element making a single king move.

Table of values

n a(n)
1 1
2 9
3 33
4 185
5 913
6 4777
7 24577
8 127385
9 658801
10 3410313
11 17648609
12 91343481
13 472746833
14 2446730345
15 12663143361
16 65538688857
17 339198332209
18 1755536122697
19 9085854920609
20 47024245778489
21 243376070611729
22 1259603657442857

List of values

[1, 9, 33, 185, 913, 4777, 24577, 127385, 658801, 3410313, 17648609, 91343481, 472746833, 2446730345, 12663143361, 65538688857, 339198332209, 1755536122697, 9085854920609, 47024245778489, 243376070611729, 1259603657442857]

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

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