a(n) = A218542(n) - A218543(n).

Terms

a(0) =1a(1) =-1a(2) =0a(3) =-1a(4) =-1a(5) =-3a(6) =-1a(7) =-6a(8) =-8a(9) =-10a(10) =-7a(11) =-4a(12) =2a(13) =2a(14) =-14a(15) =-90a(16) =-318a(17) =-896a(18) =-2166a(19) =-4691a(20) =-9298a(21) =-17175a(22) =-30007a(23) =-50261a(24) =-81664a(25) =-129637a(26) =-200973a(27) =-301205a(28) =-426500a(29) =-545183