# A375253 (b-file synthesized from sequence entry) 0 1 1 5 2 30 3 140 4 630 5 2646 6 10710 7 41910 8 159885 9 597025 10 2190188 11 7914270 12 28230020 13 99567300 14 347720040 15 1203777072 16 4135047615 17 14105322315 18 47813634330 19 161154659820 20 540353553894 21 1803226621350 22 5991410183850 23 19827295283250 24 65371101643575