# A085584 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 9 5 20 6 45 7 100 8 222 9 491 10 1086 11 2401 12 5310 13 11744 14 25977 15 57460 16 127101 17 281144 18 621882 19 1375579 20 3042726 21 6730385 22 14887338 23 32930188 24 72840249 25 161119700 26 356390301 27 788321020 28 1743734406 29 3857070395 30 8531684622