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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.

A213773 Rectangular array: (row n) = b**c, where b(h) = 3*h-2, c(h) = 3*n-5+3*h, n>=1, h>=1, and ** = convolution.

Table of values

n a(n)
1 1
2 8
3 4
4 30
5 23
6 7
7 76
8 66
9 38
10 10
11 155
12 142
13 102
14 53
15 13
16 276
17 260
18 208
19 138
20 68
21 16
22 448
23 429
24 365
25 274
26 174
27 83
28 19
29 680
30 658
31 582
32 470
33 340
34 210
35 98
36 22
37 981
38 956
39 868
40 735
41 575
42 406
43 246
44 113
45 25
46 1360
47 1332
48 1232
49 1078

List of values

[1, 8, 4, 30, 23, 7, 76, 66, 38, 10, 155, 142, 102, 53, 13, 276, 260, 208, 138, 68, 16, 448, 429, 365, 274, 174, 83, 19, 680, 658, 582, 470, 340, 210, 98, 22, 981, 956, 868, 735, 575, 406, 246, 113, 25, 1360, 1332, 1232, 1078]