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.

A268014 Number of n X 2 0..2 arrays with every repeated value in every row and column greater than or equal to the previous repeated value.

Table of values

n a(n)
1 9
2 81
3 729
4 6084
5 49284
6 386884
7 2965284
8 22268961
9 164378041
10 1195430625
11 8581613769
12 60904316944
13 427872974400
14 2978730810000
15 20567785069584
16 140966727989481
17 959632952511249
18 6492348190361881
19 43674091151207841

List of values

[9, 81, 729, 6084, 49284, 386884, 2965284, 22268961, 164378041, 1195430625, 8581613769, 60904316944, 427872974400, 2978730810000, 20567785069584, 140966727989481, 959632952511249, 6492348190361881, 43674091151207841]

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

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