511360domain: NAppears in sequencestanh(arcsin(sinh(x)))=x-4/5!*x^5+80/7!*x^7+5456/9!*x^9+511360/11!*x^11...at n=5A012106Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 5 king-move adjacent elements, with upper left element zero.at n=12A303957