A038209 Can express a(n) with the digits of a(n)^3 in order, only adding plus signs.

0, 1, 8, 10, 17, 18, 26, 27, 28, 45, 55, 62, 63, 71, 72, 81, 82, 89, 91, 99, 100, 107, 108, 109, 116, 125, 134, 136, 143, 144, 145, 153, 154, 161, 181, 188, 189, 197, 198, 199, 206, 207, 208, 215, 216, 224, 226, 233, 234, 235, 242, 243, 244, 253, 261, 262, 269

Offset: 1

Author

Erich Friedman

Keywords

• nonn
• base

Comments

All terms == 0, 1 or 8 (mod 9). - Robert Israel, Sep 07 2020

Examples

			62^3 = 238328 and 23+8+3+28 = 62.
		

Links

• Robert Israel, Table of n, a(n) for n = 1..5500

Programs

Maple

F:= proc(n, t) local d; option remember;
   if n = t then return true fi;
   if n < t then return false fi;
   for d from 1 to min(ilog10(t)+1, ilog10(n)+1) do
     if procname(floor(n/10^d), t - (n mod 10^d)) then return true fi
   od;
   false
end proc:
A:=select(t -> F(t^3, t), [$0..1000]); # Robert Israel, Sep 07 2020

Extensions

Offset changed by Robert Israel, Sep 07 2020