# A342817 (b-file synthesized from sequence entry) 0 1 1 -4 2 4 3 16 4 52 5 112 6 -48 7 -1984 8 -11212 9 -33360 10 6224 11 713536 12 4441872 13 13004480 14 -17374656 15 -432012032 16 -2525831628 17 -6454496208 18 21147389392 19 326358047552 20 1794285832464 21 4124461926592 22 -19727734694848 23 -263598020446976 24 -1416694290412784 25 -3151402998261312