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.

A346061 A(n,k) = n! * [x^n] (Sum_{j=0..n} k^(j*(j+1)/2) * x^j/j!)^(1/k) if k>0, A(n,0) = 0^n; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 1
5 0
6 1
7 1
8 1
9 0
10 1
11 1
12 3
13 1
14 0
15 1
16 1
17 7
18 23
19 1
20 0
21 1
22 1
23 13
24 199
25 393
26 1
27 0
28 1
29 1
30 21
31 901
32 17713
33 13729
34 1
35 0
36 1
37 1
38 31
39 2861
40 249337
41 4572529
42 943227
43 1
44 0
45 1
46 1
47 43
48 7291
49 1900521
50 264273961
51 3426693463
52 126433847
53 1
54 0

List of values

[1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 3, 1, 0, 1, 1, 7, 23, 1, 0, 1, 1, 13, 199, 393, 1, 0, 1, 1, 21, 901, 17713, 13729, 1, 0, 1, 1, 31, 2861, 249337, 4572529, 943227, 1, 0, 1, 1, 43, 7291, 1900521, 264273961, 3426693463, 126433847, 1, 0]