# A150109 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 19 4 69 5 263 6 1044 7 4240 8 17595 9 74391 10 318493 11 1378895 12 6022039 13 26520440 14 117549906 15 524068965 16 2348103782 17 10568464412 18 47754218422 19 216537083286 20 984983798215 21 4493317804295 22 20550859759855 23 94213221969645 24 432845203438126 25 1992563341419802 26 9189311952508953 27 42450573153408853