Number of different strings of length n+4 obtained from "123...n" by iteratively duplicating any substring.

A137741

Number of different strings of length n+4 obtained from "123...n" by iteratively duplicating any substring.

Terms

    a(0) =1a(1) =16a(2) =54a(3) =119a(4) =218a(5) =360a(6) =555a(7) =814a(8) =1149a(9) =1573a(10) =2100a(11) =2745a(12) =3524a(13) =4454a(14) =5553a(15) =6840a(16) =8335a(17) =10059a(18) =12034a(19) =14283a(20) =16830a(21) =19700a(22) =22919a(23) =26514a(24) =30513a(25) =34945a(26) =39840a(27) =45229a(28) =51144a(29) =57618

External references