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A139384
The number of 3-digit multiples of n whose digits sum to n.
2
1, 2, 6, 3, 5, 12, 4, 5, 45, 9, 8, 17, 5, 5, 13, 4, 4, 25, 1, 0, 4, 0, 0, 1, 0, 0, 1
OFFSET
1,2
EXAMPLE
a(1)=1 as 100 is the only 3-digit multiple of 1 whose digits sum to 1, while a(19)=1 as 874 is the only 3-digit multiple of 19 with the property.
MATHEMATICA
dm3[n_]:=Module[{min=n*Ceiling[100/n], max=n*Floor[999/n]}, Length[ Select[Range[min, max, n], Total[IntegerDigits[#]]==n&]]]; Array[dm3, 30] (* Harvey P. Dale, Dec 18 2011 *)
CROSSREFS
Sequence in context: A163338 A323335 A338444 * A083481 A177209 A274439
KEYWORD
base,full,nonn,fini
AUTHOR
Ian Duff, Jun 08 2008
STATUS
approved