# A038360 (b-file synthesized from sequence entry) 3 1 4 3 5 6 6 14 7 29 8 60 9 123 10 249 11 503 12 1012 13 2032 14 4075 15 8164 16 16347 17 32719 18 65471 19 130986 20 262030 21 524137 22 1048376 23 2096887 24 4193953 25 8388143 26 16776600 27 33553616 28 67107783 29 134216296 30 268433559 31 536868399 32 1073738495 33 2147479238 34 4294961454 35 8589926853 36 17179858932 37 34359724787 38 68719458745 39 137438929639 40 274877875372