# A149066 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 11 4 41 5 165 6 693 7 2975 8 13102 9 58543 10 265533 11 1216437 12 5625630 13 26208715 14 122883878 15 579308565 16 2743787003 17 13048731447 18 62277382336 19 298169598323 20 1431550417591 21 6890222494696 22 33237555228170 23 160656725334807 24 777962747662943 25 3773430268357265 26 18330224672912397 27 89165583321567972