# A074371 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 3 5 6 6 10 7 22 8 40 9 76 10 166 11 306 12 558 13 1260 14 2508 15 6876 16 13596 17 31068 18 66012 19 144636 20 298692 21 656532 22 1411650 23 3114050 24 6907892 25 12800744 26 24982760 27 51166280 28 112488680 29 239410280 30 501240080 31 1039913300 32 2346376556 33 4608703112 34 8900121992 35 18206157332