%I A035265
%S A035265 1,12,264,8448,354816,18450432,1143926784,82362728448,6753743732736,
%T A035265 621344423411712,63377131187994624,7098238693055397888,
%U A035265 865985120552758542336,114310035912964127588352
%N A035265 One half of deca-factorial numbers.
%C A035265 a(n)= (Pochhammer(2/10,n)*10^n)/2.
%H A035265 <a href="Sindx_Fa.html#factorial">Index entries for sequences related 
               to factorial numbers</a>
%F A035265 2*a(n) = (10*n-8)(!^10) := product(10*j-8, j=1..n)= 2^n*A008548(n), A008548(n)=(5*n-4)(!^5) 
               := product(5*j-4, j=1..n); E.g.f. (-1+(1-10*x)^(-1/5))/2.
%Y A035265 Cf. A008548, A045757, A035272-A035279.
%Y A035265 Sequence in context: A053324 A138451 A113672 this_sequence A068271 A068283 
               A003390
%Y A035265 Adjacent sequences: A035262 A035263 A035264 this_sequence A035266 A035267 
               A035268
%K A035265 easy,nonn
%O A035265 1,2
%A A035265 Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)