# A148944 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 9 4 29 5 103 6 393 7 1523 8 5985 9 24617 10 102357 11 430363 12 1838761 13 7931043 14 34615153 15 152208659 16 673421637 17 3003153451 18 13464915837 19 60712552141 20 275067241835 21 1251061909991 22 5715825705399 23 26206169918477 24 120562798767589 25 556428210284773 26 2574906598392645 27 11950271335525375 28 55598176180817699