# A308246 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 4 5 8 6 18 7 44 8 104 9 246 10 620 11 1600 12 4082 13 10436 14 27360 15 73046 16 193296 17 509984 18 1371214 19 3727792 20 10065872 21 27145058 22 74142688 23 204005440 24 558475342 25 1527058912 26 4213709856 27 11694035010 28 32331790700 29 89266126856 30 248240818282 31 693599213260