# A366096 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 15 4 51 5 187 6 719 7 2858 8 11650 9 48438 10 204630 11 875867 12 3790172 13 16554305 14 72883035 15 323109570 16 1441152303 17 6462494515 18 29118219850 19 131761291852 20 598529262016 21 2728346941040 22 12476533435028 23 57220220120080 24 263125059775970 25 1212942573227309