# A056721 (b-file synthesized from sequence entry) 1 0 2 1 3 4 4 5 5 8 6 10 7 25 8 49 9 76 10 128 11 175 12 238 13 550 14 796 15 1219 16 2012 17 2846 18 11336 19 21296 20 49808 21 74318 22 236891 23 608989 24 1715905 25 5112847