# A149192 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 38 5 123 6 493 7 1807 8 7496 9 29400 10 125564 11 514621 12 2245001 13 9488604 14 42075089 15 181941417 16 817228089 17 3596501357 18 16322969441 19 72842426204 20 333437372040 21 1504895912513 22 6938137755904 23 31607538219604 24 146610789828190 25 673159600610476 26 3138793839304676 27 14508091716818350