# A254007 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 7 5 13 6 22 7 40 8 66 9 118 10 192 11 338 12 546 13 948 14 1526 15 2618 16 4208 17 7146 18 11482 19 19332 20 31070 21 51938 22 83520 23 138786 24 223330 25 369284 26 594662 27 979306 28 1578064 29 2590138 30 4176394 31 6836164 32 11028942 33 18012562