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

Offset: 1

Author

Amarnath Murthy, May 03 2001

Keywords

• nonn
• base
• easy

Examples

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

Crossrefs

Cf. A061383-A061388, A061423-A061425.

Programs

Magma

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

Mathematica

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

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001