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.

A229842 Number of nX3 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 3
2 81
3 987
4 13401
5 178311
6 2381469
7 31783299
8 424240833
9 5662582239
10 75582071565
11 1008840783171
12 13465626160209
13 179734091085543
14 2399022766771749
15 32021249796760479
16 427407548197383945
17 5704874525707845543

List of values

[3, 81, 987, 13401, 178311, 2381469, 31783299, 424240833, 5662582239, 75582071565, 1008840783171, 13465626160209, 179734091085543, 2399022766771749, 32021249796760479, 427407548197383945, 5704874525707845543]

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

Content is available under The OEIS End-User License Agreement.