A024903 - OEIS

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A024903

Numbers n such that 7*n-4 is prime.

1, 3, 5, 9, 11, 15, 23, 29, 33, 35, 39, 41, 45, 51, 53, 59, 69, 75, 81, 83, 89, 93, 95, 111, 113, 119, 123, 135, 141, 143, 149, 159, 161, 165, 171, 179, 183, 185, 189, 195, 209, 213, 221, 225, 231, 233, 239, 243, 251, 261, 269, 273, 279, 299, 305, 321, 335, 341 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n) = A033868(n-1)-1 = A089033(n-1)+1 = A090614(n-1)*2+1.`
	PROG	`(MAGMA) [ n: n in [1..400] \| IsPrime(7*n-4) ]; [From Vincenzo Librandi, Nov 20 2010]`
	CROSSREFS	`A045437 gives primes, A090613 gives prime index.` `Cf. A033868, A045437, A089033, A090613, A090614.` `Sequence in context: A104635 A199407 A169780 * A018486 A024414 A072391` `Adjacent sequences: A024900 A024901 A024902 * A024904 A024905 A024906`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.