# A026021 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 6 5 10 6 19 7 34 8 62 9 117 10 207 11 407 12 704 13 1430 14 2431 15 5070 16 8502 17 18122 18 30056 19 65246 20 107236 21 236436 22 385662 23 861764 24 1396652 25 3157325 26 5088865 27 11622015 28 18642420 29 42961470 30 68624295 31 159419670 32 253706790 33 593636670 34 941630580