151688domain: NAppears in sequencesSix-digit exclusionary squares: 6-digit numbers whose squares comprise digits none of which appears in the number itself.at n=13A195438Expansion of Product_{k>=0} 1/(1-x^(4*k+1))^4.at n=30A261636Number of unsensed planar maps with n vertices and 2 faces.at n=11A380239