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%I #4 Dec 30 2023 21:42:27
%S 73,75,79,85,99,127,201,425,1253,5199,29945,229823,2275065,28132841,
%T 423135497,7573775211,158441583469,3816126076107,104494456797095
%N a(1) = 73, a(n) = prime(a(n-1)) - 4*a(n-1).
%t NestList[ Prime@# - 4# &, 73, 18]
%Y Cf. A007097, A074271, A179274, A179511, A179512, A179513, A179514, A179515, A179517, A179518.
%K nonn
%O 1,1
%A _Robert G. Wilson v_, Jul 17 2010