Array read by antidiagonals: numerators of the core of the classical Bernoulli numbers.

Terms

a(0) =2a(1) =-1a(2) =1a(3) =-1a(4) =-8a(5) =-1a(6) =1a(7) =4a(8) =-4a(9) =-1a(10) =-1a(11) =4a(12) =8a(13) =4a(14) =-1a(15) =-1a(16) =-8a(17) =-4a(18) =4a(19) =8a(20) =1a(21) =7a(22) =-4a(23) =-116a(24) =-32a(25) =-116a(26) =-4a(27) =7a(28) =5a(29) =32