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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.

A131075 First subdiagonal of triangular array T: T(j,1) = 1 for ((j-1) mod 8) < 4, else 0; T(j,k) = T(j-1,k-1) + T(j,k-1) for 2 <= k <= j.

Table of values

n a(n)
1 1
2 2
3 4
4 7
5 11
6 16
7 22
8 30
9 46
10 92
11 232
12 628
13 1652
14 4096
15 9544
16 21000
17 43912
18 87824
19 169120
20 315952
21 578096
22 1048576
23 1913440
24 3567072
25 6874336
26 13748672
27 28384384
28 59797312
29 126906176
30 268435456
31 561834112
32 1158971520
33 2353246336
34 4706492672
35 9292452352

List of values

[1, 2, 4, 7, 11, 16, 22, 30, 46, 92, 232, 628, 1652, 4096, 9544, 21000, 43912, 87824, 169120, 315952, 578096, 1048576, 1913440, 3567072, 6874336, 13748672, 28384384, 59797312, 126906176, 268435456, 561834112, 1158971520, 2353246336, 4706492672, 9292452352]

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

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