(n-1)-st elementary symmetric function of the first n terms of (1,2,1,3,1,4,1,5,...)=A133622.

A203193

(n-1)-st elementary symmetric function of the first n terms of (1,2,1,3,1,4,1,5,...)=A133622.

Terms

    a(0) =1a(1) =3a(2) =5a(3) =17a(4) =23a(5) =98a(6) =122a(7) =634a(8) =754a(9) =4644a(10) =5364a(11) =38268a(12) =43308a(13) =351504a(14) =391824a(15) =3566736a(16) =3929616a(17) =39659040a(18) =43287840a(19) =479795040a(20) =519711840a(21) =6276458880a(22) =6755460480a(23) =88299987840a(24) =94527008640

External references