# A126399 (b-file synthesized from sequence entry) 0 1 1 12 2 54 3 250 4 1168 5 5486 6 25848 7 122024 8 576748 9 2728038 10 12909648 11 61108496 12 289310874 13 1369855464 14 6486547342 15 30716393200 16 145458062754 17 688830120102 18 3262050022332 19 15447978818780 20 73156731187376 21 346447866034700