A061386 - OEIS

A061386

Sum of digits = 3 times number of digits.

3, 15, 24, 33, 42, 51, 60, 108, 117, 126, 135, 144, 153, 162, 171, 180, 207, 216, 225, 234, 243, 252, 261, 270, 306, 315, 324, 333, 342, 351, 360, 405, 414, 423, 432, 441, 450, 504, 513, 522, 531, 540, 603, 612, 621, 630, 702, 711, 720, 801, 810, 900, 1029

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

EXAMPLE

126 is a term as the arithmetic mean of the digits is (1+2+6)/3 = 3.

MATHEMATICA

Select[Range[1200], 3IntegerLength[#]==Total[IntegerDigits[#]]&] (* Harvey P. Dale, Feb 04 2011 *)

PROG

(Magma) [ n: n in [1..1030] | &+Intseq(n) eq 3*#Intseq(n) ]; // Bruno Berselli, Jun 30 2011

CROSSREFS