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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.
2
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
1,1
COMMENTS
Numbers (other than 0) that end in zero are excluded.
FORMULA
Equals one more than the partial sums of A098701.
EXAMPLE
For n = 2 the a(2) = 10 solutions are 0, 1, 2, 3, 11, 12, 13, 21, 22, 31.
CROSSREFS
Sequence in context: A021004 A020709 A020734 * A298412 A289245 A347725
KEYWORD
nonn,base
AUTHOR
David Radcliffe, May 05 2013
STATUS
approved