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%I #5 Feb 08 2024 20:44:07
%S 1,2,1,2,4,2,3,6,3,2,6,4,3,6,3,4,8,4,6,8,3,6,10,2,7,10,4,6,10,2,5,10,
%T 5,6,10,6,9,14,6,10,14,8,7,14,6,6,14,8,5,18,9,6,14,10,6,16,10,8,16,10,
%U 6,14,9,6,18,8,5,24,11,8,24,12,7,20,11,8,16,10
%N Number of different lucky numbers occurring when 2n is expressed as p1+q1 = ... = pk+qk where pk,qk are lucky numbers with pk <= qk.
%C n=5: 10 = 1+9 = 3+7, we can see 4 different lucky numbers. so a(5) = 4.
%Y Cf. A000959, A002850.
%K easy,nonn
%O 1,2
%A _Naohiro Nomoto_, Feb 25 2002
%E More terms from _Sean A. Irvine_, Feb 08 2024