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.

A131025 Antidiagonal sums of triangular array T: T(j,1) = 1 for ((j-1) mod 6) < 3, else 0; T(j,k) = T(j-1,k-1) + T(j-1,k) for 2 <= k <= j.

Table of values

n a(n)
1 1
2 1
3 3
4 2
5 5
6 3
7 9
8 6
9 16
10 11
11 27
12 22
13 50
14 50
15 101
16 114
17 215
18 255
19 471
20 552
21 1024
22 1145
23 2169
24 2290
25 4460
26 4460
27 8921
28 8556
29 17477
30 16383
31 33861
32 31674
33 65536
34 62255
35 127791
36 124510
37 252302
38 252302
39 504605
40 514446
41 1019051
42 1048575
43 2067627

List of values

[1, 1, 3, 2, 5, 3, 9, 6, 16, 11, 27, 22, 50, 50, 101, 114, 215, 255, 471, 552, 1024, 1145, 2169, 2290, 4460, 4460, 8921, 8556, 17477, 16383, 33861, 31674, 65536, 62255, 127791, 124510, 252302, 252302, 504605, 514446, 1019051, 1048575, 2067627]