Triangle read by rows: Characteristic polynomials of lower triangular Bell number matrix.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-3a(4) =2a(5) =1a(6) =-8a(7) =17a(8) =-10a(9) =1a(10) =-23a(11) =137a(12) =-265a(13) =150a(14) =1a(15) =-75a(16) =1333a(17) =-7389a(18) =13930a(19) =-7800a(20) =1a(21) =-278a(22) =16558a(23) =-277988a(24) =1513897a(25) =-2835590a(26) =1583400a(27) =1a(28) =-1155a(29) =260364