Triangle a(n,k) read by rows: product s(n,k)*s(n+1,k+1) of Stirling numbers of the first kind.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =3a(5) =1a(6) =0a(7) =22a(8) =18a(9) =1a(10) =0a(11) =300a(12) =385a(13) =60a(14) =1a(15) =0a(16) =6576a(17) =11250a(18) =2975a(19) =150a(20) =1a(21) =0a(22) =211680a(23) =444976a(24) =165375a(25) =14875a(26) =315a(27) =1a(28) =0a(29) =9408960