%I #4 Mar 30 2012 18:40:30
%S 0,1,2,3,5,6,9,11,12,17,20,22,23,31,37,40,42,43,57,68,74,77,79,80,105,
%T 125,136,142,145,147,148,193,230,250,261,267,270,272,273,355,423,460,
%U 480,491,497,500,502,503,653,778,846,883,903,914,920,923,925,926,1201
%N Differences of nonzero tribonacci numbers.
%C Primes in this sequence are A113239. Perfect powers include: 9 = 3^2, 125 = 5^3, 1681 = 41^2, 2209 = 47^2, 25281 = 159^2 = 3^2 * 53^2. A113188-A113194 deal with difference sets of Fibonacci numbers and Lucas numbers and primes in those difference sets.
%F {a(n)} = { A000073(i) - A000073(j) such that i>=j }. Nonnegative elements in difference set of tribonacci sequence A000073.
%Y Cf. A000073, A113188-A113194.
%K easy,nonn
%O 1,3
%A _Jonathan Vos Post_, Oct 19 2005
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