id:A067366 - OEIS Search Results

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Numbers n such that 1+C(n,floor(n/2)) is prime, where C(n,floor(n/2)) = A001405(n) is a central binomial coefficient.

+0
2

0, 1, 2, 4, 5, 8, 9, 11, 14, 24, 27, 37, 38, 44, 47, 76, 89, 92, 97, 123, 124, 136, 143, 144, 168, 243, 297, 332, 368, 393, 417, 428, 443, 680, 696, 697, 817, 890, 981, 1034, 1053, 1201, 1349, 1384, 1455, 1537, 1589, 1634, 1705, 2077, 2632, 2635, 2762, 3197 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`The corresponding primes are in A066749.`
	MATHEMATICA	`For[ n=0, True, n++, If[ PrimeQ[ Binomial[ n, Floor[ n/2 ] ]+1 ], Print[ n ] ] ]`
	CROSSREFS	`Cf. A001405, A066749.` `Sequence in context: A084464 A080148 A032787 this_sequence A161903 A099628 A137169` `Adjacent sequences: A067363 A067364 A067365 this_sequence A067367 A067368 A067369`
	KEYWORD	`nonn`
	AUTHOR	`Dean Hickerson (dean.hickerson(AT)yahoo.com), Jan 20 2002`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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