a(n) = a(n-1) + c(n) for n >= 3, a( ) increasing, given a(1)=1 a(2)=2; where c( ) is complement of a( ).

A022946

a(n) = a(n-1) + c(n) for n >= 3, a( ) increasing, given a(1)=1 a(2)=2; where c( ) is complement of a( ).