# A048066 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 20 9 35 10 105 11 168 12 364 13 588 14 1260 15 2250 16 4960 17 9460 18 20020 19 38500 20 77001 21 148161 22 286689 23 560469 24 1071525 25 2143051 26 4064071 27 8259196 28 15473436 29 31705476 30 58620692 31 120894085 32 221227279 33 459855214