# A027329 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 52 4 340 5 2120 6 12966 7 78404 8 471049 9 2819296 10 16836187 11 100413044 12 598466970 13 3565829520 14 21245133183 15 126592343380 16 754484832586 17 4497987650048 18 26824346741653 19 160027308774544 20 955033911144732 21 5701712685169392 22 34052840254416123 23 203451441144122916