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.

A250779 Number of (n+1) X (4+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 99
2 238
3 534
4 1152
5 2426
6 5028
7 10306
8 20960
9 42394
10 85420
11 171666
12 344392
13 690122
14 1381908
15 2765858
16 5534192
17 11071354
18 22146236
19 44296626
20 88598104
21 177201834
22 354410148
23 708827714
24 1417663872
25 2835337306
26 5670685388
27 11341382866

List of values

[99, 238, 534, 1152, 2426, 5028, 10306, 20960, 42394, 85420, 171666, 344392, 690122, 1381908, 2765858, 5534192, 11071354, 22146236, 44296626, 88598104, 177201834, 354410148, 708827714, 1417663872, 2835337306, 5670685388, 11341382866]