a(n) = a(n-1) + a(n-2) + R(a(n-3)) + R(a(n-4)) where a(1)=a(2)=a(3)=a(4)=1 and R(n) (A004086) is the reverse of n.

A074864

a(n) = a(n-1) + a(n-2) + R(a(n-3)) + R(a(n-4)) where a(1)=a(2)=a(3)=a(4)=1 and R(n) (A004086) is the reverse of n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =7a(6) =13a(7) =25a(8) =49a(9) =112a(10) =244a(11) =502a(12) =1051a(13) =2206a(14) =3904a(15) =7816a(16) =19243a(17) =37174a(18) =66697a(19) =144349a(20) =292510a(21) =563698a(22) =1879315a(23) =3401746a(24) =6192718a(25) =15630610a(26) =33434152a(27) =63708721a(28) =106919440a(29) =197375245

External references