# A024861 (b-file synthesized from sequence entry) 2 2 3 3 4 11 5 18 6 44 7 71 8 147 9 238 10 450 11 728 12 1304 13 2110 14 3652 15 5909 16 10001 17 16182 18 26984 19 43661 20 72085 21 116636 22 191284 23 309504 24 505312 25 817612 26 1330854 27 2153367 28 3498039 29 5659946 30 9181940