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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.

A240446 Numbers of ways to place six indistinguishable points on an n X n square grid so that no four of them are vertices of a square of any orientation.

Table of values

n a(n)
3 32
4 6726
5 166702
6 1895938
7 13790212
8 74380406
9 322961410
10 1188292304
11 3835115230
12 11126671552
13 29549197210
14 72828900336
15 168386628278
16 368360769558
17 767733010896
18 1533170797506
19 2947620125778
20 5477517677094
21 9871827636572
22 17305042166112
23 29579923394356
24 49410229230976
25 80809088567212
26 129615220384928
27 204196987161028
28 316383511891814
29 482682961875178
30 725860819178050

List of values

[32, 6726, 166702, 1895938, 13790212, 74380406, 322961410, 1188292304, 3835115230, 11126671552, 29549197210, 72828900336, 168386628278, 368360769558, 767733010896, 1533170797506, 2947620125778, 5477517677094, 9871827636572, 17305042166112, 29579923394356, 49410229230976, 80809088567212, 129615220384928, 204196987161028, 316383511891814, 482682961875178, 725860819178050]

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

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