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a(1) = 1, a(2n+1) - a(2n) = composite(n), a(2n) - a(2n-1) = prime(n).
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%I #7 Jun 24 2022 23:37:20

%S 1,3,7,10,16,21,29,36,45,56,66,79,91,108,122,141,156,179,195,224,242,

%T 273,293,330,351,392,414,457,481,528,553,606,632,691,718,779,807,874,

%U 904,975,1007,1080,1113,1192,1226,1309,1344,1433,1469,1566,1604,1705

%N a(1) = 1, a(2n+1) - a(2n) = composite(n), a(2n) - a(2n-1) = prime(n).

%Y Partial sums of A073846.

%K nonn

%O 1,2

%A _Amarnath Murthy_, Oct 26 2003

%E More terms from _David Wasserman_, Aug 16 2005