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 A113600 Numbers K with 2n digits such that the two n-digit numbers formed by the alternate digits are divisors of K. 1
 11, 12, 15, 22, 24, 33, 36, 44, 48, 55, 66, 77, 88, 99, 1012, 1071, 1100, 1111, 1155, 1188, 1200, 1224, 1275, 1320, 1350, 1400, 1500, 1620, 1664, 1848, 1980, 1995, 2016, 2024, 2079, 2100, 2150, 2184, 2200, 2222, 2310, 2376, 2400, 2448, 2500, 2550, 2640 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1600 EXAMPLE 130788 is in the sequence because 130788 is divisible by 108 and 378. MATHEMATICA addQ[n_]:=Module[{c=FromDigits/@Transpose[Partition[ IntegerDigits[n], 2]], a, b}, a =First[c]; b=Last[c]; a!=0&&b!=0&&And@@Divisible[ n, {a, b}]]; Flatten[Table[Select[Range[10^(2n-1), 10^(2n)-1], addQ], {n, 2}]] (* Harvey P. Dale, Oct 21 2013 *) CROSSREFS Sequence in context: A292683 A139138 A249766 * A255725 A287442 A255726 Adjacent sequences:  A113597 A113598 A113599 * A113601 A113602 A113603 KEYWORD base,easy,nonn AUTHOR Amarnath Murthy, Nov 09 2005 EXTENSIONS Corrected and extended by Matthew Conroy, Dec 18 2005 STATUS approved

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Last modified August 3 10:49 EDT 2020. Contains 336198 sequences. (Running on oeis4.)