Triangle of B-analogs of Stirling numbers of first kind.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =-4a(5) =3a(6) =1a(7) =-9a(8) =23a(9) =-15a(10) =1a(11) =-16a(12) =86a(13) =-176a(14) =105a(15) =1a(16) =-25a(17) =230a(18) =-950a(19) =1689a(20) =-945a(21) =1a(22) =-36a(23) =505a(24) =-3480a(25) =12139a(26) =-19524a(27) =10395a(28) =1a(29) =-49