# A126396 (b-file synthesized from sequence entry) 0 1 1 9 2 39 3 175 4 793 5 3611 6 16475 7 75229 8 343633 9 1569883 10 7172423 11 32769925 12 149723361 13 684077955 14 3125520983 15 14280373781 16 65246447425 17 298108406323 18 1362045450407 19 6223131628517 20 28433241805745 21 129910355608771