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.

A250775 Number of (7+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

n a(n)
1 576
2 1026
3 1622
4 2396
5 3412
6 4798
7 6810
8 9960
9 15272
10 24794
11 42622
12 76948
13 144156
14 277014
15 541058
16 1067360
17 2118064
18 4217458
19 8414118
20 16805196
21 33584996
22 67142126
23 134253802
24 268474456
25 536912952
26 1073787018
27 2147532110
28 4295019140

List of values

[576, 1026, 1622, 2396, 3412, 4798, 6810, 9960, 15272, 24794, 42622, 76948, 144156, 277014, 541058, 1067360, 2118064, 4217458, 8414118, 16805196, 33584996, 67142126, 134253802, 268474456, 536912952, 1073787018, 2147532110, 4295019140]

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

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