id:A120483 - OEIS Search Results

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A120483

Decimal expansion of s = sum_{i=1..infinity} (1/c(i))^i, where c(i) is the i-th composite number.

+0
1

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

	OFFSET	`1,1`
	EXAMPLE	`Sum is (1/4)^1 + (1/6)^2 + (1/8)^3 + (1/9)^4 + (1/10)^5 + ... = 0.279893663...`
	MATHEMATICA	`k = s = 0; Do[If[ !PrimeQ[n], k++; s += (1/n)^k], {n, 2, 100}]; First[RealDigits[N[s, 100]]]`
	CROSSREFS	`Sequence in context: A011054 A130818 A114940 this_sequence A124823 A086725 A019950` `Adjacent sequences: A120480 A120481 A120482 this_sequence A120484 A120485 A120486`
	KEYWORD	`cons,nonn`
	AUTHOR	`Ryan Propper (rpropper(AT)stanford.edu), Jul 21 2006`

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

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