# A139416 (b-file synthesized from sequence entry) 1 3 2 6 3 12 4 70 5 600281 6 60 7 1458 8 264 9 450 10 266875 11 12670498046853 12 480 13 3998684814453099 14 11968722 15 299538 16 3640 17 49921080474853515591 18 1980 19 6107691150665283203125 20 14960 21 575047378296833 22 4068173828125 23 13936286848094463348388671875 24 6552 25 5035427051913