# A048694 (b-file synthesized from sequence entry) 0 1 1 7 2 15 3 37 4 89 5 215 6 519 7 1253 8 3025 9 7303 10 17631 11 42565 12 102761 13 248087 14 598935 15 1445957 16 3490849 17 8427655 18 20346159 19 49119973 20 118586105 21 286292183 22 691170471 23 1668633125 24 4028436721 25 9725506567