A204461 - cp's OEIS frontend

A204461 Number of n-element subsets that can be chosen from {1,2,...,5n} having element sum n(5*n+1)/2.

n	a(n)
0	1
1	1
2	5
3	25
4	177
5	1394
6	11963
7	108108
8	1016737
9	9853759
10	97809616
11	989878326
12	10180316707
13	106124695130
14	1119148085092
15	11920389375524
16	128077285062639
17	1386689101261013
18	15115933170815361
19	165776800325379769
20	1828006462946421194
21	20256667860779557632

[1, 1, 5, 25, 177, 1394, 11963, 108108, 1016737, 9853759, 97809616, 989878326, 10180316707, 106124695130, 1119148085092, 11920389375524, 128077285062639, 1386689101261013, 15115933170815361, 165776800325379769, 1828006462946421194, 20256667860779557632]

cp's OEIS Frontend

A204461 Number of n-element subsets that can be chosen from {1,2,...,5n} having element sum n(5*n+1)/2.

Table of values

List of values

cp's OEIS Frontend

A204461 Number of n-element subsets that can be chosen from {1,2,...,5*n} having element sum n*(5*n+1)/2.

Table of values

List of values

A204461 Number of n-element subsets that can be chosen from {1,2,...,5n} having element sum n(5*n+1)/2.