%I
%S 1,1,0,1,1,1,1,2,2,3,1,3,2,3,3,5,2,5,3,5,4,6,3,7,5,7,5,8,5,9,6,8,7,10,
%T 7,12,7,9,9,12,8,13,9,12,10,13,9,15,11,15,11,15,11,17,13,16,13,17,13,
%U 20,14,16,15,20,15,22,15,18,17,22,16,23,17,21,18,23,18,26,18,23
%N Number of unordered partitions {k1, k2} of n such that k1 and k2 are nonnegative nonprimes A141468.
%H Andrew Howroyd, <a href="/A171691/b171691.txt">Table of n, a(n) for n = 1..10000</a>
%e a(1) = 1 because 1 = 0 + 1.
%e a(2) = 1 because 2 = 1 + 1.
%e a(3) = 0.
%e a(4) = 1 because 4 = 0 + 4.
%e a(5) = 1 because 5 = 1 + 4.
%e a(6) = 1 because 6 = 0 + 6.
%e a(7) = 1 because 7 = 1 + 6.
%e a(8) = 2 because 8 = 0 + 8 = 4 + 4.
%o (PARI) a(n)={sum(i=0, n\2, (i<2  !isprime(i)) && !isprime(ni))} \\ _Andrew Howroyd_, Jan 05 2020
%Y Cf. A062610, A141468, A224708.
%K nonn
%O 1,8
%A _JuriStepan Gerasimov_, Dec 15 2009
%E Name clarified and terms a(55) and beyond from _Andrew Howroyd_, Jan 05 2020
