-9726

Appears in sequences

• a(n) = 2(a(n-2) - a(n-1)) + a(n-3) where a(0)=-3, a(1)=11 & a(2)=-30.at n=8A098150
• Generalized Pascal's triangle made using Mod[(Prime[n] - 1)/2, 4] == 2 primorial-like Stirling polynomials.at n=50A119724
• A symmetrical triangle of polynomial coefficients based on the Hermite polynomials with leading coefficient adjusted to one: p(x,n)=HermiteH[n,x]-HermiteH[0,x]+x^n*(HermiteH[n,1/x]-HermiteH[0,1/x]).at n=47A176064
• G.f. (1-x) * Sum_{n>=0} x^n * (1 + x^n)^n / (1 + x^(n+1))^(n+1).at n=55A354247