# A009530 (b-file synthesized from sequence entry) 0 1 1 0 2 12 3 -336 4 -2096 5 -1043328 6 -29488704 7 -8894706432 8 -389860902656 9 -170568226222080 10 -6327905330549760 11 -6080018829202427904 12 242897035394043301888 13 -323994054628796940582912 14 123697309877515731773669376 15 -13142696592417683099946516480