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.

A266465 Number of n X 3 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

Table of values

n a(n)
1 2
2 5
3 12
4 29
5 67
6 147
7 303
8 590
9 1090
10 1922
11 3253
12 5311
13 8400
14 12918
15 19377
16 28425
17 40873
18 57722
19 80196
20 109776
21 148240
22 197703
23 260666
24 340063
25 439318
26 562401
27 713894
28 899055
29 1123895
30 1395251
31 1720873
32 2109508
33 2570998
34 3116374
35 3757967

List of values

[2, 5, 12, 29, 67, 147, 303, 590, 1090, 1922, 3253, 5311, 8400, 12918, 19377, 28425, 40873, 57722, 80196, 109776, 148240, 197703, 260666, 340063, 439318, 562401, 713894, 899055, 1123895, 1395251, 1720873, 2109508, 2570998, 3116374, 3757967]

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

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