A346581 - cp's OEIS frontend

A346581 a(n) = (1/(7n)) Sum_{d|n} mu(n/d) * binomial(7*d,d).

n	a(n)
1	1
2	6
3	63
4	728
5	9275
6	124866
7	1753073
8	25365600
9	375677595
10	5667202850
11	86775157139
12	1345153422600
13	21069043965983
14	332927798516614
15	5301031234076325
16	84967018610221440
17	1369846562874360886
18	22199151535757655354
19	361411377745122110421
20	5908312923789590118600

[1, 6, 63, 728, 9275, 124866, 1753073, 25365600, 375677595, 5667202850, 86775157139, 1345153422600, 21069043965983, 332927798516614, 5301031234076325, 84967018610221440, 1369846562874360886, 22199151535757655354, 361411377745122110421, 5908312923789590118600]

cp's OEIS Frontend

A346581 a(n) = (1/(7n)) Sum_{d|n} mu(n/d) * binomial(7*d,d).

Table of values

List of values

cp's OEIS Frontend

A346581 a(n) = (1/(7*n)) * Sum_{d|n} mu(n/d) * binomial(7*d,d).

Table of values

List of values

A346581 a(n) = (1/(7n)) Sum_{d|n} mu(n/d) * binomial(7*d,d).