-19131876

Appears in sequences

• Row 9 of array in A288580.at n=27A092974
• A triangular sequence from the Z/nZ matrix addition tables as in sequence A095897 as coefficients of characteristic polynomials: M(n,m)=Mod[n + m, d] for n <=m<=d.at n=47A138064
• a(n) = w(n+1)/(2*w(n)), where w=A203422.at n=6A203423