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.

A274746 Number of n X 5 0..2 arrays with no element equal to any value at offset (-1,-2) (0,-1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 8
2 60
3 518
4 4554
5 40242
6 355504
7 3140840
8 27748676
9 245154340
10 2165891856
11 19135242632
12 169056228008
13 1493579612136
14 13195491722256
15 116579658950800
16 1029959107782112
17 9099492769592768
18 80392287459022000
19 710250565228311920

List of values

[8, 60, 518, 4554, 40242, 355504, 3140840, 27748676, 245154340, 2165891856, 19135242632, 169056228008, 1493579612136, 13195491722256, 116579658950800, 1029959107782112, 9099492769592768, 80392287459022000, 710250565228311920]

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

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