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%I #11 Jun 29 2023 10:44:28
%S 1,7,105,1575,23625,354375,5315625,79734375,1196015625,17940234375,
%T 269103515625,4036552734375,60548291015625,908224365234375,
%U 13623365478515625,204350482177734375,3065257232666015625
%N Fifth column of triangle A067417.
%H Vincenzo Librandi, <a href="/A067420/b067420.txt">Table of n, a(n) for n = 0..800</a>
%H <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (15).
%F a(n) = A067417(n+4, 4).
%F a(n) = 7*(3*5)^(n-1), n >= 1, a(0)=1.
%F G.f.: (1-8*x)/(1-15*x).
%o (Magma) [Ceiling(7*(3*5)^(n-1)): n in [0..20]]; // _Vincenzo Librandi_, Oct 02 2011
%Y Cf. A067419 (fourth column), A067421 (sixth column), A001024 (powers of 15).
%K nonn,easy
%O 0,2
%A _Wolfdieter Lang_, Jan 25 2002