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A168573
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Numbers requiring exactly one step to reach 14 using map n -> sum of largest digit of all divisors of n (A168239).
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1
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15, 34, 44, 106, 115, 134, 142, 155, 213, 214, 314, 321, 334, 404, 453, 515, 713, 1006, 1046, 1114, 1115, 1142, 1214, 1234, 1263, 1402, 1403, 1555, 1703, 1849, 2021, 2031, 2103, 2123, 2234, 2306, 2342, 2434, 2761, 3046, 3062, 3106, 3134, 3142, 3153, 3214
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OFFSET
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1,1
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REFERENCES
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J. Earls, "Black Hole 14," Mathematical Bliss, Pleroma Publications, 2009, pages 18-22. ASIN: B002ACVZ6O
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LINKS
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MATHEMATICA
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Select[Range[15, 2200], Total[Max[IntegerDigits[#]]&/@Divisors[#]]==14&] (* Harvey P. Dale, May 22 2012 *)
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PROG
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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