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.

A250768 Number of (n+1) X (7+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)
1 519
2 798
3 1158
4 1680
5 2526
6 4020
7 6810
8 12192
9 22758
10 43692
11 85362
12 168504
13 334590
14 666564
15 1330314
16 2657616
17 5312022
18 10620636
19 21237666
20 42471528
21 84939054
22 169873908
23 339743418
24 679482240
25 1358959686
26 2717914380
27 5435823570

List of values

[519, 798, 1158, 1680, 2526, 4020, 6810, 12192, 22758, 43692, 85362, 168504, 334590, 666564, 1330314, 2657616, 5312022, 10620636, 21237666, 42471528, 84939054, 169873908, 339743418, 679482240, 1358959686, 2717914380, 5435823570]

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

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