# A295910 (b-file synthesized from sequence entry) 2 4 3 9 4 30 5 61 6 160 7 301 8 718 9 1305 10 3000 11 5377 12 12190 13 21733 14 49024 15 87237 16 196446 17 349345 18 786232 19 1397881 20 3145486 21 5592141 22 12582624 23 22369309 24 50331310 25 89478121 26 201326200 27 357913521 28 805305918 29 1431655285 30 3221224960 31 5726622517 32 12884901310 33 22906491633