# A151259 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 13 5 35 6 104 7 309 8 950 9 3001 10 9580 11 31122 12 102447 13 340154 14 1141687 15 3861440 16 13151163 17 45099030 18 155500732 19 538992037 20 1877191730 21 6565129272 22 23052066243 23 81232416035 24 287194928135 25 1018509372930 26 3622229673983 27 12916151094960 28 46169898399992 29 165415989450629 30 593924178778286 31 2136775816554616