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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.

A229843 Number of nX4 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 9
2 423
3 13401
4 453837
5 15269193
6 514371027
7 17324310663
8 583513743897
9 19653679602141
10 661968066724119
11 22296164158938861
12 750971189107675233
13 25293934916476773699
14 851940997449956765547
15 28694762814404871782187

List of values

[9, 423, 13401, 453837, 15269193, 514371027, 17324310663, 583513743897, 19653679602141, 661968066724119, 22296164158938861, 750971189107675233, 25293934916476773699, 851940997449956765547, 28694762814404871782187]

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

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