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Search: id:A078670
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| A078670 |
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Number of times n appears among the decimal digits of (n!)!. |
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+0
1
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OFFSET
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1,4
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EXAMPLE
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a(4)=4 because 4 appears four times in (4!)! = 620448401733239439360000.
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PROGRAM
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(PARI) {mdcp(d, n)=local(a, c=0, L); L=length(Str(d)); if(L>1, a=2, a=1); while(n>0, if(n%(10^a)==d, n=floor(n/10); c++, n=floor(n/10); )); c } for(n=1, 10, print1(mdcp(n, n!!)", "))
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CROSSREFS
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Cf. A000197.
Adjacent sequences: A078667 A078668 A078669 this_sequence A078671 A078672 A078673
Sequence in context: A060072 A107872 A008858 this_sequence A065527 A041667 A132684
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KEYWORD
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base,more,nonn,new
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Dec 16 2002
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EXTENSIONS
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Added a(9) and a(10). - Ryan Leonel (ryan.leonel(AT)gmail.com), Oct 03 2008
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