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.

A323970 Number of 6 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{6,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.

Table of values

n a(n)
0 1
1 10
2 85
3 632
4 3423
5 14795
6 54219
7 174844
8 508484
9 1357051
10 3367166
11 7846507
12 17311702
13 36401032
14 73344164
15 142259423
16 266651159
17 484610624
18 856389171
19 1475218962
20 2482510921
21 4088870385
22 6602746625
23 10468982846
24 16320069070
25 25043533065
26 37869646820

List of values

[1, 10, 85, 632, 3423, 14795, 54219, 174844, 508484, 1357051, 3367166, 7846507, 17311702, 36401032, 73344164, 142259423, 266651159, 484610624, 856389171, 1475218962, 2482510921, 4088870385, 6602746625, 10468982846, 16320069070, 25043533065, 37869646820]