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%I #8 Jan 19 2016 17:26:56
%S 0,1,2,3,5,5,10,7,17,24,41,11,52,13,65,78,143,17,160,19,179,198,377,
%T 23,400,423,823,1246,2069,29,2098,31,2129,2160,4289,6449,10738,37,
%U 10775,10812,21587,41,21628,43,21671,21714,43385,47,43432,43479,86911,130390,217301,53,217354,217407,434761
%N If n is 0, 1, or prime, a(n) = n; else a(n) = a(n-1) + a(n-2).
%F See the name.
%e a(9) = a(8) + a(7)
%e = a(7) + a(6) + 7
%e = a(5) + a(4) + 14
%e = a(3) + a(2) + 19
%e = 24
%t a[0] = 0; a[1] = 1; a[n_] := a[n] = If[PrimeQ@ n, n, a[n - 1] + a[n - 2]]; Table[a@ n, {n, 0, 56}] (* _Michael De Vlieger_, Dec 15 2015 *)
%K nonn,easy
%O 0,3
%A _Nicholas Drozd_, Dec 15 2015
%E More terms from _Michael De Vlieger_, Dec 15 2015
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