# A036720 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 4 4 8 5 27 6 79 7 270 8 894 9 3130 10 11011 11 39622 12 143879 13 528919 14 1960248 15 7323999 16 27542451 17 104194485 18 396204388 19 1513599583 20 5806283770 21 22356914550 22 86376741339 23 334752355281 24 1300999638753 25 5069411676111 26 19800500391264