References to A061909

Skinny numbers: numbers n with property that there are no carries when n is squared by "long multiplication".
0, 1, 2, 3, 10, 11, 12, 13, 20, 21, 22, 30, 31, 100, 101, 102, 103, 110, 111, 112, 113

2 seqfan posts