# A181588 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 28 5 658 6 36336 7 4918960 8 1913308480 9 2722820397008 10 16147361055588096 11 383879833447290828032 12 34790330152647391683716096 13 11818617432918372433417869737472