# A024950 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 9 5 13 6 33 7 73 8 145 9 313 10 657 11 1693 12 3705 13 8101 14 18753 15 45777 16 105857 17 238481 18 556257 19 1358901 20 3192585 21 7386269 22 17475041 23 42632153 24 101388497 25 238670857 26 566984561 27 1396385741 28 3345556153 29 7948311797 30 19091588993 31 46987486625