# A045625 (b-file synthesized from sequence entry) 0 1 1 2 2 1 3 4 4 7 5 18 6 29 7 70 8 126 9 266 10 507 11 1054 12 2037 13 4158 14 8183 15 16488 16 32760 17 65790 18 131026 19 262654 20 524265 21 1049524 22 2097119 23 4196350 24 8388450 25 16781292 26 33554367 27 67116784 28 134217657 29 268451838 30 536870247 31 1073774590 32 2147483520