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A221638
Numbers that are divisible by the sum of the squares of their digits when alternately added and subtracted starting from units (rightmost).
1
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
EXAMPLE
a(20)=156 since 6^2-5^2+1^2=12 divides 156.
CROSSREFS
Sequence in context: A075492 A225742 A338855 * A358998 A085772 A162189
KEYWORD
nonn,base
AUTHOR
Carmine Suriano, May 04 2013
STATUS
approved