a(n) = Sum_{k=0..n} (k+1)^6 * Stirling1(n,k).

Terms

a(0) =1a(1) =64a(2) =665a(3) =2037a(4) =-1316a(5) =-1148a(6) =16400a(7) =-116032a(8) =809592a(9) =-6059424a(10) =49512792a(11) =-442266888a(12) =4302605280a(13) =-45351578400a(14) =515054655360