# A007143 (b-file synthesized from sequence entry) 1 0 2 0 3 3 4 16 5 65 6 238 7 866 8 3128 9 11493 10 42660 11 160584 12 610640 13 2345504 14 9081768 15 35422175 16 139022622 17 548671517 18 2176051050 19 8668363573 20 34667284390 21 139140830956 22 560271494630 23 2262709876003 24 9163000968554 25 37198940600264 26 151364381618576