%I A054487
%S A054487 1,14,90,390,1320,3762,9438,21450,45045,88660,165308,294372,503880,
%T A054487 833340,1337220,2089164,3187041,4758930,6970150,10031450,14208480,
%U A054487 19832670,27313650,37153350,49961925,66475656,87576984,114316840
%N A054487 A second order recursive sequence.
%D A054487 I. Adler, Three Diophantine equations - Part II, Fib. Quart., 7 (1969), 
               pps. 181-193.
%D A054487 A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, 
               pps. 122-125, 194-196.
%D A054487 E. I. Emerson, Recurrent Sequences in the Equation DQ^2=R^2+N, Fib. Quart., 
               7 (1969), pps. 231-242.
%F A054487 a(n)=(3n+4)*C(n+7, 7)/4.
%F A054487 G.f.: (1+5*x)/(1-x)^9.
%Y A054487 Cf. A034265.
%Y A054487 Cf. A093563 ((6, 1) Pascal, column m=8).
%Y A054487 Sequence in context: A034544 A077538 A114242 this_sequence A047639 A010930 
               A022609
%Y A054487 Adjacent sequences: A054484 A054485 A054486 this_sequence A054488 A054489 
               A054490
%K A054487 easy,nonn
%O A054487 0,2
%A A054487 Barry E. Williams, May 06 2000
%E A054487 Corrected and extended by James A. Sellers (sellersj(AT)math.psu.edu), 
               May 10 2000