G.f. A(x) satisfies: [x^k] (1+x)^(n*(n+1)/2) * A(x) = 0 for k = n*(n-1)/2 + 1 through k = n*(n+1)/2 for n >= 1.

A305601

G.f. A(x) satisfies: [x^k] (1+x)^(n*(n+1)/2) * A(x) = 0 for k = n*(n-1)/2 + 1 through k = n*(n+1)/2 for n >= 1.

Terms

    a(0) =1a(1) =-1a(2) =0a(3) =2a(4) =-7a(5) =21a(6) =-56a(7) =125a(8) =-209a(9) =154a(10) =572a(11) =-3404a(12) =11930a(13) =-35394a(14) =99144a(15) =-274550a(16) =757813a(17) =-2057867a(18) =5392764a(19) =-13383194a(20) =30829315a(21) =-63995085a(22) =112304664a(23) =-133488537a(24) =-70063101a(25) =1177164984a(26) =-5212740024a(27) =17744267816a(28) =-53365305260a(29) =149452146536

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