# A067920 (b-file synthesized from sequence entry) 1 2 2 2 3 2 4 4 5 11 6 14 7 57 8 100 9 1778 10 2355 11 7690 12 21334 13 89831 14 126718 15 365351 16 665175 17 914152 18 1469797 19 3554254 20 25042522 21 190651419 22 580715831 23 1803513148 24 3705699670 25 44927205487 26 232354919706 27 1600668490436 28 7538452976365 29 12294187702836 30 28817421277388