# A181594 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 25 5 128 6 758 7 5014 8 36194 9 280433 10 2303918 11 19885534 12 179028087 13 1671644720 14 16114138846 15 159761516110 16 1623972412726 17 16880442523007 18 179026930243822 19 1933537655138482 20 21231023519199575 21 236674460790503286 22 2675162663681345170 23 30625903703241927542