A221638 Numbers that are divisible by the sum of the squares of their digits when alternately added and subtracted starting from units (rightmost).

1, 10, 12, 20, 21, 24, 45, 48, 50, 54, 100, 111, 112, 120, 122, 132, 133, 144, 155, 156, 166, 177, 188, 199, 200, 210, 221, 224, 225, 230, 232, 240, 243, 244, 258, 270, 288, 292, 312, 320, 331, 332, 333, 342, 375, 376, 396, 400, 420, 427, 441, 448, 450, 460, 464, 465, 480, 487, 498, 500

Offset

1,2

Links

Carmine Suriano, Table of n, a(n) for n = 1..1500

Example

a(20)=156 since 6^2-5^2+1^2=12 divides 156.

Crossrefs

Sequence in context: A075492 A225742 A338855 * A358998 A085772 A162189

Adjacent sequences: A221635 A221636 A221637 * A221639 A221640 A221641

Keyword

nonn,base

Author

Carmine Suriano, May 04 2013

Status

approved