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 A113239 Prime differences of tribonacci numbers. 6

%I

%S 2,3,5,11,17,23,31,37,43,79,193,491,503,653,883,1201,10607,19009,

%T 19469,19489,34963,35809,46499,223273,223313,391231,409817,410731,

%U 532159,634061,754549,1383769,1389533,2552621,2555753,3311233,4477453,4700621

%N Prime differences of tribonacci numbers.

%C 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.

%F 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}.

%e a(1) = 2 because 4 - 2 = 2 where 4 and 2 are tribonacci numbers.

%e a(2) = 3 because 7 - 4 = 3 where 7 and 4 are tribonacci numbers.

%e a(3) = 5 because 7 - 2 = 5 where 7 and 2 are tribonacci numbers.

%e a(4) = 11 because 13 - 2 = 11 where 13 and 2 are tribonacci numbers.

%e a(5) = 17 because 24 - 7 = 17 where 24 and 7 are tribonacci numbers.

%Y Cf. A000040, A000073, A113188-A113194, A113238.

%K easy,nonn

%O 1,1

%A _Jonathan Vos Post_, Oct 19 2005

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Last modified July 10 13:04 EDT 2020. Contains 335576 sequences. (Running on oeis4.)