A346579 - cp's OEIS frontend

A346579 a(n) = (1/(5n)) Sum_{d|n} mu(n/d) * binomial(5*d,d).

n	a(n)
1	1
2	4
3	30
4	240
5	2125
6	19776
7	192129
8	1922496
9	19692504
10	205444500
11	2175519379
12	23322637440
13	252631900235
14	2760767859780
15	30400169155500
16	336977763170048
17	3757141504436392
18	42107201575798248
19	474084628585822412
20	5359833703935374000
21	60823006052351537106
22	692556314455384443196

[1, 4, 30, 240, 2125, 19776, 192129, 1922496, 19692504, 205444500, 2175519379, 23322637440, 252631900235, 2760767859780, 30400169155500, 336977763170048, 3757141504436392, 42107201575798248, 474084628585822412, 5359833703935374000, 60823006052351537106, 692556314455384443196]

cp's OEIS Frontend

A346579 a(n) = (1/(5n)) Sum_{d|n} mu(n/d) * binomial(5*d,d).

Table of values

List of values

cp's OEIS Frontend

A346579 a(n) = (1/(5*n)) * Sum_{d|n} mu(n/d) * binomial(5*d,d).

Table of values

List of values

A346579 a(n) = (1/(5n)) Sum_{d|n} mu(n/d) * binomial(5*d,d).