# A049132 (b-file synthesized from sequence entry) 1 1 2 1 3 0 4 0 5 2 6 2 7 3 8 19 9 42 10 82 11 280 12 768 13 1807 14 5167 15 14713 16 38361 17 105722 18 299954 19 821480 20 2272736 21 6422244 22 17979356 23 50311418 24 142328594 25 402652059 26 1137986155 27 3232284414 28 9201271726 29 26196062383 30 74759129271 31 213809119056