# A149369 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 12 4 45 5 171 6 687 7 2803 8 11748 9 49831 10 214434 11 931716 12 4085156 13 18040522 14 80183435 15 358314337 16 1608920279 17 7254733913 18 32835218026 19 149109378700 20 679164584418 21 3101883535311 22 14201896280766 23 65169414956550 24 299665789841870 25 1380552538613722 26 6371296684194483 27 29451369951867444