110827

Appears in sequences

• a(0)=0, a(1)=1, a(2n)=18*a(n), a(2n+1)=a(2n)+1.at n=27A197352
• Square array A(n,k) = A341527(A246278(n,k)), read by falling antidiagonals; denominators of the columnwise first quotients of A341605/A341606.at n=34A341627