A346578 - cp's OEIS frontend

A346578 a(n) = (1/(4n)) Sum_{d|n} mu(n/d) * binomial(4*d,d).

n	a(n)
1	1
2	3
3	18
4	112
5	775
6	5598
7	42287
8	328640
9	2615085
10	21191125
11	174303162
12	1451424960
13	12211799223
14	103655906781
15	886568152950
16	7633233227520
17	66105170315083
18	575445689879247
19	5032380942945321
20	44191451767056400
21	389514699012969936
22	3444925385161998518
23	30561576846316109863

[1, 3, 18, 112, 775, 5598, 42287, 328640, 2615085, 21191125, 174303162, 1451424960, 12211799223, 103655906781, 886568152950, 7633233227520, 66105170315083, 575445689879247, 5032380942945321, 44191451767056400, 389514699012969936, 3444925385161998518, 30561576846316109863]

cp's OEIS Frontend

A346578 a(n) = (1/(4n)) Sum_{d|n} mu(n/d) * binomial(4*d,d).

Table of values

List of values

cp's OEIS Frontend

A346578 a(n) = (1/(4*n)) * Sum_{d|n} mu(n/d) * binomial(4*d,d).

Table of values

List of values

A346578 a(n) = (1/(4n)) Sum_{d|n} mu(n/d) * binomial(4*d,d).