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A038209 Can express a(n) with the digits of a(n)^3 in order, only adding plus signs. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

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

LINKS

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

EXAMPLE

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

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

CROSSREFS

Sequence in context: A289687 A155966 A228072 * A319293 A061908 A056020

Adjacent sequences:  A038206 A038207 A038208 * A038210 A038211 A038212

KEYWORD

nonn,base

AUTHOR

Erich Friedman

EXTENSIONS

Offset changed by Robert Israel, Sep 07 2020

STATUS

approved

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Last modified May 8 06:27 EDT 2021. Contains 343653 sequences. (Running on oeis4.)