245337domain: NAppears in sequencesa(1)=1, a(n)=a(n-1)+n^0 if n odd, a(n)=a(n-1)+ n^4 if n is even.at n=17A140142Monotonic ordering of nonnegative differences 4^i-7^j, for 40>= i>=0, j>=0.at n=31A192165