75043domain: NAppears in sequencesLet b(1)=1, b(2)=2, b(n) = sum of digits of b(1)+b(2)+b(3)+...+b(n-1), sequence gives values of n such that b(n)=3.at n=30A084229Growth series for affine Coxeter group (or affine Weyl group) D_9.at n=10A266764Expansion of Product_{k>=1} (1 - (x*(1 - x))^k).at n=28A327671