# A215666 (b-file synthesized from sequence entry) 0 0 1 -3 2 6 3 -9 4 21 5 -33 6 72 7 -120 8 249 9 -432 10 867 11 -1545 12 3033 13 -5502 14 10644 15 -19539 16 37434 17 -69261 18 131841 19 -245217 20 464784 21 -867492 22 1639569 23 -3067260 24 5786199 25 -10841349 26 20425857 27 -38310246 28 72118920 29 -135356595 30 254667006 31 -478188705 32 899357613