# A077917 (b-file synthesized from sequence entry) 0 1 1 -1 2 5 3 -11 4 33 5 -87 6 241 7 -655 8 1793 9 -4895 10 13377 11 -36543 12 99841 13 -272767 14 745217 15 -2035967 16 5562369 17 -15196671 18 41518081 19 -113429503 20 309895169 21 -846649343 22 2313089025 23 -6319476735 24 17265131521 25 -47169216511 26 128868696065 27 -352075825151 28 961889042433 29 -2627929735167