618277domain: NAppears in sequencesa(n) = Sum_{i=0..n} Sum_{j=0..n} T(i,j), T given by A026769.at n=16A026778Numerators of continued fraction convergents to sqrt(701).at n=5A042348Number of binary strings of length n with equal numbers of 00001 and 00010 substrings.at n=20A164192