A358702 - OEIS

%I #5 Dec 04 2022 08:34:12

%S 1,0,0,2,0,0,4,0,3,8,0,0,7,0,0,13,0,24,17,0,0,43,0,0,67,0,63,134,0,0,

%T 83,0,0,167,0,264,314,0,0,313,0,0,707,0,1374,836,0,0,1667,0,0,2236,0,

%U 3114,4472,0,0,6833,0,0,8167,0,8937,16667,0,0,21886,0,0,29614

%N a(n) is the least k > 0 such that the sum of the decimal digits of k^2 is n, or 0 if no such k exists.

%Y The nonzero terms are A067179.

%Y Cf. A056991, A231897 (similar for binary weight).

%K nonn,base

%O 1,4

%A _Hugo Pfoertner_, Dec 04 2022