# A146033 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 7 5 15 6 39 7 189 8 995 9 5569 10 37913 11 366061 12 4244909 13 58320195 14 974389263 15 20855855835 16 546928072163 17 17575257415665 18 693118931384501 19 34026835620030291 20 2054942936198627105 21 152983262052724174217