# A125851 (b-file synthesized from sequence entry) 1 0 2 3 3 6 4 12 5 19 6 30 7 40 8 54 9 69 10 87 11 102 12 123 13 149 14 174 15 198 16 225 17 253 18 287 19 313 20 354 21 396 22 435