A204465 - cp's OEIS frontend

A204465 Number of n-element subsets that can be chosen from {1,2,...,9n} having element sum n(9*n+1)/2.

n	a(n)
0	1
1	1
2	9
3	85
4	1143
5	17053
6	276373
7	4721127
8	83916031
9	1537408202
10	28851490163
11	552095787772
12	10736758952835
13	211657839534446
14	4221164530621965
15	85031286025167082
16	1727896040082882283
17	35382865902724442331
18	729502230296220422918
19	15132164184348997874504

[1, 1, 9, 85, 1143, 17053, 276373, 4721127, 83916031, 1537408202, 28851490163, 552095787772, 10736758952835, 211657839534446, 4221164530621965, 85031286025167082, 1727896040082882283, 35382865902724442331, 729502230296220422918, 15132164184348997874504]

cp's OEIS Frontend

A204465 Number of n-element subsets that can be chosen from {1,2,...,9n} having element sum n(9*n+1)/2.

Table of values

List of values

cp's OEIS Frontend

A204465 Number of n-element subsets that can be chosen from {1,2,...,9*n} having element sum n*(9*n+1)/2.

Table of values

List of values

A204465 Number of n-element subsets that can be chosen from {1,2,...,9n} having element sum n(9*n+1)/2.