# A002768 (b-file synthesized from sequence entry) 0 5 1 13 2 30 3 59 4 109 5 187 6 312 7 497 8 775 9 1176 10 1753 11 2561 12 3694 13 5245 14 7366 15 10223 16 14056 17 19137 18 25853 19 34637 20 46092 21 60910 22 80009 23 104462 24 135674 25 175274