id:A104499 - OEIS Search Results

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Primes by index in A001945.

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2

4, 6, 8, 9, 10, 11, 15, 17, 19, 23, 25, 31, 41, 47, 59, 61, 71, 113, 127, 137, 157, 167, 223, 401, 443, 457, 503, 523, 619, 701, 859, 991, 1021, 1187, 1217, 1223, 1361, 1847, 1867, 2237, 2579, 2693, 3313, 4219, 4931, 4967, 5413, 7727, 8011, 8389, 8761, 13781 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All the numbers greater than a(11)=25 are prime so far.`
	MATHEMATICA	`a[0] = 0; a[1] = a[2] = a[3] = a[5] = 1; a[4] = 5; a[n_] := a[n] = -a[n - 1] + a[n - 2] + 3a[n - 3] + a[n - 4] - a[n - 5] - a[n - 6]; lst = {}; Do[ If[ PrimeQ[a [ n]], AppendTo[lst, n]], {n, 21900}]; lst`
	CROSSREFS	`Cf. A001945.` `Sequence in context: A047748 A085558 A084984 this_sequence A137353 A167376 A133576` `Adjacent sequences: A104496 A104497 A104498 this_sequence A104500 A104501 A104502`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 10 2005`

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

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