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.

A240626 Number of nX3 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order.

Table of values

n a(n)
1 4
2 109
3 4369
4 180480
5 7462748
6 308596193
7 12761076882
8 527696013254
9 21821286982448
10 902353910690193
11 37314141073241635
12 1543014450929326860
13 63806737265585893957
14 2638536352033321770102
15 109108761540671975977499

List of values

[4, 109, 4369, 180480, 7462748, 308596193, 12761076882, 527696013254, 21821286982448, 902353910690193, 37314141073241635, 1543014450929326860, 63806737265585893957, 2638536352033321770102, 109108761540671975977499]

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

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