a(n) = Sum_{k=0..n} (k+1) * 2^k * binomial(2*k+1,2*n-2*k+1).

A391894

a(n) = Sum_{k=0..n} (k+1) * 2^k * binomial(2*k+1,2*n-2*k+1).

Terms

    a(0) =1a(1) =12a(2) =64a(3) =344a(4) =1852a(5) =9504a(6) =47616a(7) =235072a(8) =1145104a(9) =5518400a(10) =26364928a(11) =125049984a(12) =589461440a(13) =2763899904a(14) =12899926016a(15) =59964819456a(16) =277750014208

External references