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.

A278435 T(n,k)=Number of nXk 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

Table of values

n a(n)
1 0
2 6
3 6
4 40
5 100
6 40
7 155
8 1609
9 1609
10 155
11 456
12 19624
13 57760
14 19624
15 456
16 1128
17 178352
18 2116789
19 2116789
20 178352
21 1128
22 2472
23 1287838
24 67971132
25 223202074
26 67971132
27 1287838
28 2472
29 4950
30 7795151
31 1796061464
32 23450120081
33 23450120081
34 1796061464

List of values

[0, 6, 6, 40, 100, 40, 155, 1609, 1609, 155, 456, 19624, 57760, 19624, 456, 1128, 178352, 2116789, 2116789, 178352, 1128, 2472, 1287838, 67971132, 223202074, 67971132, 1287838, 2472, 4950, 7795151, 1796061464, 23450120081, 23450120081, 1796061464]

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

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