# A237047 (b-file synthesized from sequence entry) 0 0 1 -1 2 -2 3 -4 4 -6 5 -8 6 -8 7 0 8 28 9 102 10 280 11 680 12 1544 13 3368 14 7152 15 14912 16 30706 17 62672 18 127124 19 256744 20 516952 21 1038672 22 2083864 23 4176576 24 8365080 25 16746150 26 33513608 27 67055456 28 134148160 29 268345208 30 536754288 31 1073591680 32 2147291036 33 4294721040 34 8589620784