Triangle of numerators of coefficients of Faulhaber polynomials used for sums of even powers.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =-1a(5) =1a(6) =1a(7) =-1a(8) =1a(9) =-1a(10) =1a(11) =-5a(12) =17a(13) =-5a(14) =5a(15) =1a(16) =-5a(17) =41a(18) =-236a(19) =691a(20) =-691a(21) =1a(22) =-7a(23) =14a(24) =-22a(25) =359a(26) =-7a(27) =7a(28) =1a(29) =-14