a(1) = 1; for n>1, a(n) = a(n-1)*b(n-1) + 1, where {b(k)} is the concatenated list of the ordered positive divisors of the terms of {a(k)}.

A129645

a(1) = 1; for n>1, a(n) = a(n-1)*b(n-1) + 1, where {b(k)} is the concatenated list of the ordered positive divisors of the terms of {a(k)}.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =7a(4) =8a(5) =25a(6) =26a(7) =183a(8) =184a(9) =369a(10) =1477a(11) =11817a(12) =11818a(13) =59091a(14) =1477276a(15) =1477277a(16) =2954555a(17) =38409216a(18) =998639617a(19) =998639618a(20) =2995918855a(21) =182751050156

External references