# A153900 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 3 4 5 5 10 6 18 7 48 8 97 9 299 10 769 11 2879 12 9061 13 41454 14 154622 15 857522 16 3902066 17 26137942 18 144826739 19 1177942368 20 7878440446 21 77715100928 22 630332738835 23 7530329483705 24 74116147914872 25 1073536700395590 26 12799994974031763