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.

A208466 T(n,k) is the number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 1
2 2
3 2
4 5
5 15
6 5
7 15
8 198
9 203
10 15
11 52
12 4041
13 20746
14 4140
15 52
16 203
17 113458
18 4132120
19 4150760
20 115975
21 203
22 877
23 4132120
24 1358524513
25 10318694804
26 1366230232
27 4213597
28 877
29 4140
30 187612143
31 671329819215
32 50996571454200
33 51074630353994

List of values

[1, 2, 2, 5, 15, 5, 15, 198, 203, 15, 52, 4041, 20746, 4140, 52, 203, 113458, 4132120, 4150760, 115975, 203, 877, 4132120, 1358524513, 10318694804, 1366230232, 4213597, 877, 4140, 187612143, 671329819215, 50996571454200, 51074630353994]