A268124 - OEIS

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A268124

a(n) = n^4 * (n+3)^6 * 4^(-n).

%I #14 Sep 06 2016 03:11:49

%S 0,1024,15625,59049,117649,160000

%N a(n) = n^4 * (n+3)^6 * 4^(-n).

%C This is an example of a simple sequence which generates integers for a while, but then generates no further integers.

%e The third term is a(2), which is 2^4 * 5^6 * 4^-2, which is 15625.

%o (PARI) a(n)=n^4*(n+3)^6/4^n \\ _Charles R Greathouse IV_, Sep 06 2016

%K nonn,fini,full,easy

%O 0,2

%A _Clive Tooth_, Jan 26 2016