# A149267 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 11 4 40 5 146 6 556 7 2193 8 8782 9 35996 10 149102 11 626514 12 2657002 13 11364796 14 49005900 15 212539829 16 927754782 17 4068514036 18 17928721394 19 79325129056 20 352268070718 21 1569846519622 22 7016512277212 23 31453931008870 24 141356729372092 25 636840991055262 26 2875436365711636 27 13009869271150484