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.

A327027 T(n, k) = (1/n) * Sum_{d|n} phi(d) * A241171(n/d, k) for n >= 1, T(0, k) = 0^k. Triangle read by rows for 0 <= k <= n.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 3
6 0
7 1
8 10
9 30
10 0
11 1
12 33
13 315
14 630
15 0
16 1
17 102
18 2646
19 15120
20 22680
21 0
22 1
23 348
24 21135
25 263340
26 1039500
27 1247400
28 0
29 1
30 1170
31 167310
32 4118400
33 32432400
34 97297200
35 97297200
36 0
37 1
38 4113
39 1333080
40 61757010
41 871620750
42 4937832900
43 11918907000
44 10216206000

List of values

[1, 0, 1, 0, 1, 3, 0, 1, 10, 30, 0, 1, 33, 315, 630, 0, 1, 102, 2646, 15120, 22680, 0, 1, 348, 21135, 263340, 1039500, 1247400, 0, 1, 1170, 167310, 4118400, 32432400, 97297200, 97297200, 0, 1, 4113, 1333080, 61757010, 871620750, 4937832900, 11918907000, 10216206000]