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.

A086113 Number of 3 X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.

Table of values

n a(n)
1 6
2 36
3 102
4 216
5 390
6 636
7 966
8 1392
9 1926
10 2580
11 3366
12 4296
13 5382
14 6636
15 8070
16 9696
17 11526
18 13572
19 15846
20 18360
21 21126
22 24156
23 27462
24 31056
25 34950
26 39156
27 43686
28 48552
29 53766
30 59340
31 65286
32 71616
33 78342
34 85476
35 93030
36 101016
37 109446
38 118332

List of values

[6, 36, 102, 216, 390, 636, 966, 1392, 1926, 2580, 3366, 4296, 5382, 6636, 8070, 9696, 11526, 13572, 15846, 18360, 21126, 24156, 27462, 31056, 34950, 39156, 43686, 48552, 53766, 59340, 65286, 71616, 78342, 85476, 93030, 101016, 109446, 118332]