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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.

A252979 Number of n X 4 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down.

Table of values

n a(n)
1 3
2 13
3 33
4 68
5 1247
6 8487
7 27905
8 62977
9 114433
10 182273
11 266497
12 367105
13 484097
14 617473
15 767233
16 933377
17 1115905
18 1314817
19 1530113
20 1761793
21 2009857
22 2274305
23 2555137
24 2852353
25 3165953
26 3495937
27 3842305
28 4205057
29 4584193
30 4979713
31 5391617

List of values

[3, 13, 33, 68, 1247, 8487, 27905, 62977, 114433, 182273, 266497, 367105, 484097, 617473, 767233, 933377, 1115905, 1314817, 1530113, 1761793, 2009857, 2274305, 2555137, 2852353, 3165953, 3495937, 3842305, 4205057, 4584193, 4979713, 5391617]

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

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