# A089276 (b-file synthesized from sequence entry) 1 1 2 1 3 8 4 1 5 48 6 180 7 1 8 160 9 3204 10 8064 11 1 12 400 13 24972 14 311328 15 604800 16 1 17 840 18 125468 19 4654656 20 42454080 21 68428800 22 1 23 1568 24 476728 25 40968960 26 1073980368 27 7803233280 28 10897286400 29 1 30 2688 31 1490328 32 254542720 33 15076235088 34 306406471680