id:A071626 - OEIS Search Results

Search: id:A071626

Displaying 1-1 of 1 results found.

page 1

Number of distinct exponents when n! is factorized as a product of primes.

+0
2

0, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11 (list; graph; listen)

	OFFSET	`1,4`
	EXAMPLE	`n=7,7!=5040=2.2.2.2.3.3.5.7, three different exponents arise:4,2 and 1; a(7)=3`
	MATHEMATICA	`ffi[x_] := Flatten[FactorInteger[x]] lf[x_] := Length[FactorInteger[x]] ep[x_] := Table[Part[ffi[x], 2*w], {w, 1, lf[x]}] Table[Length[Union[ep[w! ]]], {w, 1, 100}]`
	CROSSREFS	`Cf. A051903, A051904, A071625.` `Sequence in context: A112751 A091194 A061555 this_sequence A106457 A103128 A107320` `Adjacent sequences: A071623 A071624 A071625 this_sequence A071627 A071628 A071629`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), May 29 2002`

page 1

Search completed in 0.005 seconds

Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research