Number of solutions to rev(x^2) = rev(x)^2 with at most n digits, where the function rev(x) reverses the digits of x.
A225301
Number of solutions to rev(x^2) = rev(x)^2 with at most n digits, where the function rev(x) reverses the digits of x.
Terms
- a(0) =4a(1) =10a(2) =25a(3) =64a(4) =154a(5) =363a(6) =820a(7) =1811a(8) =3873a(9) =8161a(10) =16682a(11) =33757a(12) =66865a(13) =130938a(14) =251983a(15) =480794a(16) =903982a(17) =1685564a(18) =3106009a(19) =5677864a(20) =10276936a(21) =18464659a(22) =32891188a(23) =58169965a(24) =102136773a(25) =178096365a(26) =308593320a(27) =531191385a(28) =909227947a(29) =1546356486
External references
- oeis: A225301