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A061603
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n! / {product of factorials of the digits of n}.
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2
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3628800, 39916800, 239500800, 1037836800, 3632428800, 10897286400, 29059430400, 70572902400, 158789030400, 335221286400, 1216451004088320000, 25545471085854720000, 281000181944401920000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,11
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COMMENTS
| It can be shown that the terms obtained by the above formula are positive integers using the fact that k! divides a product of k consecutive numbers.
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LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,100
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EXAMPLE
| a(12) = (12!) / { (1!)(2!) = 239500800.
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PROG
| (PARI) { for (n=0, 100, p=1; x=n; until (x==0, p*=(x - 10*(x\10))!; x\=10); write("b061603.txt", n, " ", n!/p) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 25 2009]
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CROSSREFS
| Cf. A061602.
Sequence in context: A127229 A068158 A011521 * A153761 A133132 A179065
Adjacent sequences: A061600 A061601 A061602 * A061604 A061605 A061606
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KEYWORD
| nonn,base,easy
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 19 2001
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EXTENSIONS
| Corrected and extended by Vladeta Jovovic (vladeta(AT)eunet.rs), May 19 2001
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