# A116712 (b-file synthesized from sequence entry) 1 1 2 2 3 5 4 12 5 27 6 59 7 126 8 265 9 551 10 1136 11 2327 12 4743 13 9630 14 19493 15 39363 16 79336 17 159659 18 320915 19 644414 20 1293009 21 2592783 22 5196512 23 10410735 24 20850127 25 41746622 26 83568269 27 167257931 28 334712280 29 669742371 30 1339998971