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

A204461

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

Terms

    a(0) =1a(1) =1a(2) =5a(3) =25a(4) =177a(5) =1394a(6) =11963a(7) =108108a(8) =1016737a(9) =9853759a(10) =97809616a(11) =989878326a(12) =10180316707a(13) =106124695130

External references