cp's OEIS Frontend

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.

A056638 Number of polygons of length 2n with two (self-avoiding polygon) holes on square lattice (not allowing rotations).

Table of values

n a(n)
12 2
13 122
14 3400
15 64210
16 959742
17 12294090
18 141329502
19 1500596864
20 14998956452
21 143004562082
22 1312929589140
23 11688960621918
24 101451353794222
25 861927965928610
26 7191518458613614
27 59078731187602024

List of values

[2, 122, 3400, 64210, 959742, 12294090, 141329502, 1500596864, 14998956452, 143004562082, 1312929589140, 11688960621918, 101451353794222, 861927965928610, 7191518458613614, 59078731187602024]

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

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