cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A062753 Multiples of 4 whose sum of digits is also a multiple of 4.

Original entry on oeis.org

4, 8, 40, 44, 48, 80, 84, 88, 112, 116, 152, 156, 192, 196, 220, 224, 228, 260, 264, 268, 332, 336, 372, 376, 400, 404, 408, 440, 444, 448, 480, 484, 488, 512, 516, 552, 556, 592, 596, 620, 624, 628, 660, 664, 668, 732, 736, 772, 776, 800, 804, 808, 840, 844
Offset: 1

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Author

Lisa O Coulter (lisa_coulter(AT)my-deja.com), Jul 15 2001

Keywords

Comments

Sequence is infinite since 4*10^k, k>=0 is a subsequence. - Michel Marcus, Jun 29 2018

Examples

			44 is a term of the sequence since 4 + 4 = 8 which is also a multiple of 4;
112 is a term of the sequence since 1 + 1 + 2 = 4 and 4 is obviously a multiple of 4.
8 is a multiple of 4. Numbers having digitsum 8 and are divisible by 4 below 1000 are: {8, 44, 80, 116, 152, 224, 260, 332, 404, 440, 512, 620, 800}. - _David A. Corneth_, Jun 29 2018
		

Crossrefs

Subsequence of A008586.

Programs

  • Mathematica
    Select[4 Range[250], Mod[Plus @@ IntegerDigits@ #, 4] == 0 &] (* Giovanni Resta, Jun 29 2018 *)
  • PARI
    { forstep (a=4, 10^3, 4, if (sumdigits(a)%4 == 0, print1(a, ", "))) } \\ Harry J. Smith, Aug 10 2009

Formula

Is a(n) ~ 16*n? - David A. Corneth, Jun 29 2018

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Jul 24 2001
Offset set to 1 by Giovanni Resta, Jun 29 2018