A113239 - OEIS

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A113239

Prime differences of tribonacci numbers.

2, 3, 5, 11, 17, 23, 31, 37, 43, 79, 193, 491, 503, 653, 883, 1201, 10607, 19009, 19469, 19489, 34963, 35809, 46499, 223273, 223313, 391231, 409817, 410731, 532159, 634061, 754549, 1383769, 1389533, 2552621, 2555753, 3311233, 4477453, 4700621 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`A113238 is the difference set of tribonacci numbers. A113188-A113194 deal with difference sets of Fibonacci numbers and Lucas numbers and primes in those difference sets.`
	LINKS	`Table of n, a(n) for n=1..38.`
	FORMULA	`a(n) = intersection of primes A000040 and difference set of tribonacci numbers A113238. Positive prime values of {A000073(i) - A000073(j) such that i>=j}.`
	EXAMPLE	`a(1) = 2 because 4 - 2 = 2 where 4 and 2 are tribonacci numbers.` `a(2) = 3 because 7 - 4 = 3 where 7 and 4 are tribonacci numbers.` `a(3) = 5 because 7 - 2 = 5 where 7 and 2 are tribonacci numbers.` `a(4) = 11 because 13 - 2 = 11 where 13 and 2 are tribonacci numbers.` `a(5) = 17 because 24 - 7 = 17 where 24 and 7 are tribonacci numbers.`
	CROSSREFS	`Cf. A000040, A000073, A113188-A113194, A113238.` `Sequence in context: A045309 A103664 A129942 * A049553 A049595 A258039` `Adjacent sequences: A113236 A113237 A113238 * A113240 A113241 A113242`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post, Oct 19 2005`
	STATUS	`approved`

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Last modified January 27 12:24 EST 2023. Contains 359840 sequences. (Running on oeis4.)