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.

A204225 Number of (n+1)X4 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

Table of values

n a(n)
1 2500
2 44641
3 752562
4 8183170
5 87487117
6 694547816
7 5466340007
8 34834605810
9 220710753856
10 1196535903414
11 6459574647599
12 30967790434185
13 148001428352179
14 644776741493252
15 2802681689033511
16 11319015179680230
17 45642521943090129

List of values

[2500, 44641, 752562, 8183170, 87487117, 694547816, 5466340007, 34834605810, 220710753856, 1196535903414, 6459574647599, 30967790434185, 148001428352179, 644776741493252, 2802681689033511, 11319015179680230, 45642521943090129]

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

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