id:A066766 - OEIS Search Results

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Decimal expansion of Sum_{k=1..inf} d(k)/2^k where d(k) are divisors of k, 1<=d<=k.

+0
2

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

	OFFSET	`1,1`
	REFERENCES	`S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 354-361.`
	LINKS	`S. R. Finch, Digital Search Tree Constants`
	PROGRAM	`(PARI) {smv(v)= s=0; for(i=1, matsize(v)[2], s=s+v[i]); s } {A066766(n)= sm=0; for(j=1, n, sm=sm+smv(divisors(j)/2^j)); sm*1.0 }`
	CROSSREFS	`Cf. A066772.` `Sequence in context: A125140 A110637 A092943 this_sequence A145433 A055200 A093590` `Adjacent sequences: A066763 A066764 A066765 this_sequence A066767 A066768 A066769`
	KEYWORD	`nonn,cons`
	AUTHOR	`Randall L. Rathbun, Jan 16 2002`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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