# A119575 (b-file synthesized from sequence entry) 0 9 1 16 2 50 3 180 4 686 5 2688 6 10692 7 42900 8 173030 9 700128 10 2838524 11 11522056 12 46802700 13 190182400 14 772913160 15 3141129780 16 12764118870 17 51857916000 18 210638666700 19 855355383960 20 3472419702180 21 14092569803520 22 57176602275000 23 231908298827400 24 940340123399196 25 3811765978738368