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%I #5 Mar 31 2012 13:22:16
%S 1,3,6,7,10,15,16,19,21,28,30,36,45,50,51,55,66,77,78,90,91,105,112,
%T 120,126,136,141,153,156,161,171,190,210,231,253,266,275,276,300,325,
%U 351,352,357,378,393,406,414,435,442,465,496,504,528,546,561,595,615
%N Nontrivial trinomial coefficients.
%D L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 78.
%Y Cf. A027907.
%K nonn
%O 0,2
%A _Erich Friedman_
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