# A015656 (b-file synthesized from sequence entry) 1 1 2 3 3 9 4 18 5 51 6 72 7 176 8 264 9 447 10 586 11 1128 12 1362 13 2374 14 2943 15 3868 16 4841 17 7578 18 8633 19 12828 20 14847 21 18432 22 21480 23 30081 24 33223 25 43022 26 49051 27 59449 28 66796 29 87627 30 93688 31 120554 32 134772 33 156325 34 173243 35 205164 36 219513 37 272331 38 298743