id:A000974 - OEIS Search Results

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Conjecturally the number of even integers the sum of two primes in exactly n ways.

+0
3

1, 4, 9, 11, 11, 16, 16, 18, 20, 23, 16, 29, 16, 25, 27, 23, 22, 25, 35, 29, 26, 25, 27, 27, 27, 33, 28, 44, 35, 21, 29, 35, 38, 33, 39, 37, 34, 35, 31, 31, 28, 41, 37, 32, 44, 35, 37, 41, 44, 33, 37, 32, 47, 39, 43, 47, 33, 37, 48, 41, 37, 48, 34, 35, 47, 36, 29, 36, 46, 44, 43, 38, 48 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`T. D. Noe, Table of n, a(n) for n=0..5000`
	MATHEMATICA	`f[n_] := Length[ Select[2n - Prime[ Range[ PrimePi[n]]], PrimeQ]]; a = Table[0, {75}]; Do[c = f[n]; If[c < 75, a[[c + 1]]++ ], {n, 5000}]; a (from Robert G. Wilson v (rgwv(AT)rgwv.com), using Paul Abbott's coding in A002375, Apr 07 2005)`
	CROSSREFS	`Cf. A000954, A001172, A002375` `Sequence in context: A082749 A115675 A115668 this_sequence A035233 A010396 A010431` `Adjacent sequences: A000971 A000972 A000973 this_sequence A000975 A000976 A000977`
	KEYWORD	`nonn`
	AUTHOR	`R. W. Gosper`

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

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