# A047172 (b-file synthesized from sequence entry) 1 0 2 0 3 1 4 3 5 6 6 13 7 21 8 45 9 70 10 154 11 235 12 525 13 791 14 1793 15 2681 16 6153 17 9150 18 21206 19 31401 20 73359 21 108262 22 254607 23 374715 24 886171 25 1301235 26 3091971 27 4531423 28 10811671 29 15818791 30 37877401 31 55339849 32 132924649 33 193962894 34 467187454