A371787 - cp's OEIS frontend

A371787 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(5n-k,n-2k).

n	a(n)
0	1
1	5
2	44
3	441
4	4675
5	51129
6	570401
7	6451688
8	73715212
9	848793726
10	9833394285
11	114487194485
12	1338411363535
13	15700659542105
14	184722993467063
15	2178831068873601
16	25756348168285379
17	305061478075705411
18	3619402085862708614
19	43008294559624639777

[1, 5, 44, 441, 4675, 51129, 570401, 6451688, 73715212, 848793726, 9833394285, 114487194485, 1338411363535, 15700659542105, 184722993467063, 2178831068873601, 25756348168285379, 305061478075705411, 3619402085862708614, 43008294559624639777]

cp's OEIS Frontend

A371787 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(5n-k,n-2k).

Table of values

List of values

cp's OEIS Frontend

A371787 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(5*n-k,n-2*k).

Table of values

List of values

A371787 a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(5n-k,n-2k).