# A205999 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 23 6 61 7 157 8 426 9 1163 10 3253 11 9172 12 26236 13 75634 14 220021 15 644305 16 1898977 17 5626720 18 16754652 19 50104781 20 150427938 21 453214878 22 1369857943 23 4152559458 24 12621816592 25 38459047705 26 117453028937 27 359455509767 28 1102239999454 29 3386090204843 30 10419804578693 31 32115276396739 32 99131502581481 33 306422345148052 34 948423189115351