id:A091828 - OEIS Search Results

Search: id:A091828

Displaying 1-1 of 1 results found.

page 1

a(n)=n-2*valuation(A000254(n),3).

+0
1

1, 0, 3, 4, 5, 2, 1, 4, 5, 6, 7, 6, 7, 8, 7, 8, 9, 4, 5, 6, 3, 2, 5, 6, 7, 8, 7, 8, 9, 8, 9, 10, 9, 10, 11, 8, 9, 10, 9, 10, 11, 10, 11, 12, 9, 10, 11, 10, 11, 12, 11, 12, 13, 6, 7, 8, 7, 8, 9, 8, 9, 10, 5, 6, 7, 4, 5, 6, 7, 8, 9, 8, 9, 10, 9, 10, 11, 10, 11, 12, 9, 10, 11, 10, 11, 12, 11, 12, 13 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`For n>7 a(3n)=a(n)+2; a(3n+1)=a(n)+3; (3n+2)=a(n)+4`
	PROGRAM	`(PARI) a(n)=if(n<2, 1, n-2valuation(n!sum(i=1, n, 1/i), 3))`
	CROSSREFS	`Cf. A056792.` `Sequence in context: A135347 A144786 A009389 this_sequence A121845 A099816 A099120` `Adjacent sequences: A091825 A091826 A091827 this_sequence A091829 A091830 A091831`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 09 2004`

page 1

Search completed in 0.002 seconds

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research