A093881 - OEIS

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A093881

Let n! = 2^a*3^b*5^c*7^d.... in canonical form, then a(n) = concatenation a,b,c,d,...

0, 1, 11, 31, 311, 421, 4211, 7211, 7411, 8421, 84211, 105211, 1052111, 1152211, 1163211, 1563211, 15632111, 16832111, 168321111, 188421111, 189431111, 199432111, 1994321111, 2304321111, 2306321111, 2406322111, 2436322111

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OFFSET

1,3

COMMENTS

n! is the least number with this canonical form.

LINKS

Table of n, a(n) for n=1..27.

MATHEMATICA

Do[Print[FromDigits[Last /@ FactorInteger[n! ]]], {n, 1, 30}] (* Ryan Propper, Jul 21 2005 *)

CROSSREFS

Sequence in context: A098264 A023279 A068715 * A328715 A163763 A201808

Adjacent sequences: A093878 A093879 A093880 * A093882 A093883 A093884

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Apr 22 2004

EXTENSIONS

More terms from Ryan Propper, Jul 21 2005

STATUS

approved