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.

A250859 Number of (7+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Table of values

n a(n)
1 983950
2 5480917
3 20067117
4 57570016
5 140301126
6 303858745
7 601566177
8 1109545432
9 1932426406
10 3209691541
11 5122655965
12 7902083112
13 11836435822
14 17280762921
15 24666221281
16 34510233360
17 47427280222
18 64140330037
19 85492902061

List of values

[983950, 5480917, 20067117, 57570016, 140301126, 303858745, 601566177, 1109545432, 1932426406, 3209691541, 5122655965, 7902083112, 11836435822, 17280762921, 24666221281, 34510233360, 47427280222, 64140330037, 85492902061]

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

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