# A134455 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 8 5 24 6 112 7 944 8 22880 9 2564448 10 2420884672 11 55389846424256 12 142044380887832220032 13 343873064435082883562892998016 14 19047076228497528742755382412205052966716160