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.

A274899 Number of 7 X n 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-1) or (-2,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 48
2 95
3 436
4 2049
5 9863
6 48269
7 237807
8 1173787
9 5803040
10 28746995
11 142599041
12 707620370
13 3511083299
14 17420351674
15 86438549422
16 428942623935
17 2128651136675
18 10563418237405
19 52420279346379
20 260132938554538
21 1290906088470552

List of values

[48, 95, 436, 2049, 9863, 48269, 237807, 1173787, 5803040, 28746995, 142599041, 707620370, 3511083299, 17420351674, 86438549422, 428942623935, 2128651136675, 10563418237405, 52420279346379, 260132938554538, 1290906088470552]

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

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