a(n) = Sum_{i=1..n} binomial(i+1,2)^7.

A085442

a(n) = Sum_{i=1..n} binomial(i+1,2)^7.

Terms

    a(0) =1a(1) =2188a(2) =282124a(3) =10282124a(4) =181141499a(5) =1982230040a(6) =15475158552a(7) =93839322648a(8) =467508775773

External references