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.

A185471 Number of (n+2)X5 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Table of values

n a(n)
1 13659
2 76309
3 308692
4 1043186
5 3097348
6 8297059
7 20411234
8 46732687
9 100636591
10 205574323
11 401123377
12 751921908
13 1360579387
14 2385984676
15 4068843506
16 6766785098
17 11002001311
18 17525142877
19 27400120766
20 42115574722
21 63730107482

List of values

[13659, 76309, 308692, 1043186, 3097348, 8297059, 20411234, 46732687, 100636591, 205574323, 401123377, 751921908, 1360579387, 2385984676, 4068843506, 6766785098, 11002001311, 17525142877, 27400120766, 42115574722, 63730107482]

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

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