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.

A124929 Triangle read by rows: T(n,k) = (2^k-1)*binomial(n-1,k-1) (1<=k<=n).

Table of values

n a(n)
1 1
2 1
3 3
4 1
5 6
6 7
7 1
8 9
9 21
10 15
11 1
12 12
13 42
14 60
15 31
16 1
17 15
18 70
19 150
20 155
21 63
22 1
23 18
24 105
25 300
26 465
27 378
28 127
29 1
30 21
31 147
32 525
33 1085
34 1323
35 889
36 255
37 1
38 24
39 196
40 840
41 2170
42 3528
43 3556
44 2040
45 511
46 1
47 27
48 252
49 1260
50 3906
51 7938
52 10668
53 9180
54 4599
55 1023

List of values

[1, 1, 3, 1, 6, 7, 1, 9, 21, 15, 1, 12, 42, 60, 31, 1, 15, 70, 150, 155, 63, 1, 18, 105, 300, 465, 378, 127, 1, 21, 147, 525, 1085, 1323, 889, 255, 1, 24, 196, 840, 2170, 3528, 3556, 2040, 511, 1, 27, 252, 1260, 3906, 7938, 10668, 9180, 4599, 1023]