a(n) = Sum_{k=0..n} binomial(k+7,7) * binomial(2*k,2*n-2*k).

A382474

a(n) = Sum_{k=0..n} binomial(k+7,7) * binomial(2*k,2*n-2*k).

Terms

    a(0) =1a(1) =8a(2) =44a(3) =336a(4) =2166a(5) =11832a(6) =60576a(7) =292248a(8) =1334817a(9) =5840296a(10) =24637976a(11) =100684376a(12) =400255050a(13) =1553016960a(14) =5897388492a(15) =21967711160a(16) =80425346844a(17) =289868771928

External references