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.

A275507 Number of 7 X n 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,-1) and new values introduced in order 0..2.

Table of values

n a(n)
1 48
2 200
3 1168
4 7140
5 43780
6 268152
7 1643372
8 10069540
9 61703488
10 378096660
11 2316847540
12 14196847960
13 86993404476
14 533065762516
15 3266444015616
16 20015648328132
17 122649024958372
18 751551142797496
19 4605247533843404

List of values

[48, 200, 1168, 7140, 43780, 268152, 1643372, 10069540, 61703488, 378096660, 2316847540, 14196847960, 86993404476, 533065762516, 3266444015616, 20015648328132, 122649024958372, 751551142797496, 4605247533843404]

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

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