id:A152447 - OEIS Search Results

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Decimal expansion of the sum_q 1/(q*(q-1)) over the semiprimes q = A001358.

+0
3

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

	OFFSET	`0,2`
	COMMENT	`The semiprime analog of A136141. To obtain the (smaller) sum over the square-free semiprimes A006881, subtract the prime zeta functions of 4 ( A085964 ), 6, 8 etc. from this constant here. The first term in the representation as the geometric series in powers 1/q^s is in A117543 .`
	FORMULA	`Equals 0.17105189297999663662220256437237421399124661203550059749107997... = 1/(43)+1/(65)+1/(98)+1/(109)+...`
	CROSSREFS	`Sequence in context: A036949 A059515 A136428 this_sequence A154098 A053878 A070672` `Adjacent sequences: A152444 A152445 A152446 this_sequence A152448 A152449 A152450`
	KEYWORD	`cons,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 04 2008`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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