1052184

Appears in sequences

• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=25A278458
• a(n) = 5 + 4^n + 3*((-i*sqrt(7) - 3)^n + (i*sqrt(7) - 3)^n)/2^n.at n=9A370846