id:A123340 - OEIS Search Results

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Least m such that 2^n+3^m is prime.

+0
4

0, 0, 0, 1, 0, 2, 1, 1, 0, 2, 2, 4, 1, 3, 3, 1, 0, 8, 1, 4, 8, 8, 6, 2, 7, 27, 6, 13, 1, 10, 1, 6, 4, 8, 18, 9, 19, 2, 15, 29, 3, 3, 17, 10, 3, 11, 6, 2, 5, 20, 34, 4, 12, 10, 26, 1, 4, 2, 9, 29, 29, 10, 34, 13, 4, 8, 2, 1, 8, 10, 26, 50, 19, 12, 10, 8, 13, 27, 17, 9, 33, 4, 2, 17, 1, 7, 3, 5, 61, 26 (list; graph; listen)

	OFFSET	`0,6`
	EXAMPLE	`a(0)=0 because 2^0+3^0=1+1=2 is prime,` `a(3)=1 because 2^3+3^1=8+3=11 is prime,` `a(17)=8 because 2^17+3^8=131072+6561=137633 is prime,` `a(25)=27 because 33554432+7625597484987=7625631039419 is prime, etc.`
	CROSSREFS	`Sequence in context: A122860 A123331 A114638 this_sequence A110962 A065715 A051628` `Adjacent sequences: A123337 A123338 A123339 this_sequence A123341 A123342 A123343`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Oct 11 2006`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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