a(n) = A100107(A000032(n)).A100279a(n) = A100107(A000032(n)).Terms a(0) =4a(1) =1a(2) =5a(3) =11a(4) =30a(5) =200a(6) =5880a(7) =1149852a(8) =6643838880External referencesoeis: A100279