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A097655
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Numbers n such that n=d_1!!*d_2!!*...*d_k!! where d_1 d_2 ... d_k is the decimal expansion of n.
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6
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OFFSET
| 1,2
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COMMENTS
| All terms are of the form 2^i*3^j*5^k*7^l.
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EXAMPLE
| 18432 is in the sequence because 18432=1!!*8!!*4!!*3!!*2!!.
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MATHEMATICA
| Do[h=IntegerDigits[n]; l=Length[h]; If[n==Product[h[[k]]!!, {k, l}], Print[n]], {n, 2000000000}]
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CROSSREFS
| Cf. A097653, A097654, A097643, A102279.
Sequence in context: A162100 A203966 A167444 * A080749 A070973 A054496
Adjacent sequences: A097652 A097653 A097654 * A097656 A097657 A097658
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KEYWORD
| base,nonn
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AUTHOR
| Farideh Firoozbakht (mymontain(AT)yahoo.com), Sep 10 2004
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EXTENSIONS
| More terms from Farideh Firoozbakht (mymontain(AT)yahoo.com), Jan 08 2005
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