A258320 Sum of the digits of n exceeds the sum of the digits of n^2 and the sum of digits of n^3.

49639, 496390, 736968, 4963900, 7369680, 7989889, 8962888, 49639000, 73696800, 79898890, 89628880, 284799946, 467995756, 468754968, 479593884, 479698887, 493968877, 496390000, 736968000, 789499856, 795875871, 796999858, 798968787, 798988900, 896288800

Offset

1,1

Comments

Intersection of A064399 and A064209.

Links

Giovanni Resta, Table of n, a(n) for n = 1..463 (terms < 2^(128/3))

Example

n = 49639 is in the sequence because sod(n) = 31, sod(n^2) = 25 and  sod(n^3) = 28. Here n^2 = 2464030321 and n^3 = 122312001104119.

Mathematica

sod[n_]:=Plus@@ IntegerDigits@ n; Select[Range[10^6], sod[#^3] < sod@# && sod[#^2] < sod@# &]

Crossrefs

Cf. A064399, A064209.

Sequence in context: A234563 A251881 A187856 * A258131 A081636 A151636

Adjacent sequences: A258317 A258318 A258319 * A258321 A258322 A258323

Keyword

nonn,base

Author

Giovanni Resta, May 26 2015

Status

approved