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.

4, 10, 25, 64, 154, 363, 820, 1811, 3873, 8161, 16682, 33757, 66865, 130938, 251983, 480794, 903982, 1685564, 3106009, 5677864, 10276936, 18464659, 32891188, 58169965, 102136773, 178096365, 308593320, 531191385, 909227947, 1546356486, 2617639293

Offset: 1

Author

David Radcliffe, May 05 2013

Keywords

• nonn
• base

Comments

Numbers (other than 0) that end in zero are excluded.

Examples

			For n = 2 the a(2) = 10 solutions are 0, 1, 2, 3, 11, 12, 13, 21, 22, 31.
		

Links

• David Radcliffe, Python code for calculating a(n).

Crossrefs

Cf. A085305, A061909.

Formula

Equals one more than the partial sums of A098701.