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%I #14 Jul 28 2022 20:33:08
%S 0,1,3,7,23,151,4247,1052823,8590987415,18014407100469399,
%T 309485009839359475825250455,
%U 11150372599265311880252868975683656578240663,6901746346790563787434755873427398051716420852423255530846180802039959
%N Binary packing of Fibonacci sequence A000045.
%C Prime values of a(n) begin 3, 7, 23, 151, i.e., for n = 2, 3, 4, 5. Semiprime values of a(n) begin 4247 = 31 * 137, 1052823 = 3 * 350941, i.e., for n = 6, 7. - _Jonathan Vos Post_, May 09 2005
%F a(0) = 0, a(n) = a(n-1)+(2^(Fib(n+1)-1)).
%Y Cf. A000045, A005203, A048722, A036571.
%K nonn
%O 0,3
%A Antti Karttunen, Mar 30 1999
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