# A002929 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 -2 4 0 5 -12 6 14 7 -90 8 192 9 -792 10 2148 11 -7716 12 23262 13 -79512 14 252054 15 -846628 16 2753520 17 -9205800 18 30371124 19 -101585544 20 338095596 21 -1133491188 22 3794908752 23 -12758932158 24 42903505030 25 -144655483440 26 488092130664 27 -1650000819068 28 5583090702798 29 -18918470423736 30 64167341172984 31 -217893807812346 32 740578734923544