# A155611 (b-file synthesized from sequence entry) 0 1 1 4 2 28 3 190 4 1216 5 7534 6 45928 7 277750 8 1673056 9 10058014 10 60407128 11 362619910 12 2176250896 13 13059099694 14 78359381128 15 470170635670 16 2821066860736 17 16926530304574 18 101559569247928 19 609358577749030 20 3656154953278576