a(n) = a(n-1) + R(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.

A074865

a(n) = a(n-1) + R(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) =67a(9) =157a(10) =316a(11) =1195a(12) =2635a(13) =9910a(14) =21796a(15) =33268a(16) =108541a(17) =264685a(18) =566431a(19) =1384927a(20) =2251855a(21) =10267813a(22) =23278831a(23) =68031385a(24) =119376340a(25) =223452859a(26) =339327088a(27) =1399568407a(28) =3282220573a(29) =12169858759

External references