# A008995 (b-file synthesized from sequence entry) 1 4 2 10 3 28 4 96 5 126 6 540 7 906 8 1150 9 1360 10 9586 11 15726 12 19660 13 31468 14 156006 15 360748 16 370372 17 492226 18 1349650 19 1357332 20 2010880 21 4652506 22 17051886 23 20831532 24 47326912 25 122164968 26 189695892 27 191913030