# A157519 (b-file synthesized from sequence entry) 0 1 1 6 2 30 3 150 4 726 5 3510 6 16734 7 79518 8 375246 9 1766382 10 8278638 11 38721366 12 180556206 13 840524742 14 3903866526 15 18106798830 16 83832778110 17 387690560718 18 1790330065854 19 8259528315558 20 38059497518214 21 175228328442174 22 805959153119262 23 3704270575724550