# A010843 (b-file synthesized from sequence entry) 1 1 2 -2 3 5 4 -12 5 33 6 -78 7 261 8 -360 9 3681 10 13446 11 193509 12 1951452 13 23948865 14 309740922 15 4341155877 16 65102989248 17 1041690874689 18 17708615729550 19 318755470552389 20 6056352778233924 21 121127059051462881 22 2543668229620367298