A370104 - cp's OEIS frontend

A370104 a(n) = Sum_{k=0..n} (-1)^k * binomial(2n+k-1,k) binomial(6*n-k-1,n-k).

n	a(n)
0	1
1	3
2	25
3	219
4	2025
5	19253
6	186469
7	1829565
8	18124521
9	180886260
10	1815946275
11	18318160358
12	185518492965
13	1885157971596
14	19211066004995
15	196258973605094
16	2009302383218409
17	20610411795602760
18	211768072490024440
19	2179156980022097775
20	22454554231950998275

[1, 3, 25, 219, 2025, 19253, 186469, 1829565, 18124521, 180886260, 1815946275, 18318160358, 185518492965, 1885157971596, 19211066004995, 196258973605094, 2009302383218409, 20610411795602760, 211768072490024440, 2179156980022097775, 22454554231950998275]

cp's OEIS Frontend

A370104 a(n) = Sum_{k=0..n} (-1)^k * binomial(2n+k-1,k) binomial(6*n-k-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A370104 a(n) = Sum_{k=0..n} (-1)^k * binomial(2*n+k-1,k) * binomial(6*n-k-1,n-k).

Table of values

List of values

A370104 a(n) = Sum_{k=0..n} (-1)^k * binomial(2n+k-1,k) binomial(6*n-k-1,n-k).