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.

A274799 Number of n X 4 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) (0,-1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 4
2 22
3 112
4 596
5 3104
6 16328
7 85504
8 448656
9 2352080
10 12335680
11 64684112
12 339207984
13 1778768656
14 9327806784
15 48914391648
16 256504556080
17 1345094908224
18 7053603314896
19 36988695973168
20 193966647764784
21 1017150172662336

List of values

[4, 22, 112, 596, 3104, 16328, 85504, 448656, 2352080, 12335680, 64684112, 339207984, 1778768656, 9327806784, 48914391648, 256504556080, 1345094908224, 7053603314896, 36988695973168, 193966647764784, 1017150172662336]