7761996

Appears in sequences

• Chebyshev U(n,x) polynomial evaluated at x=99 gives 2*7^2+1.at n=3A097731
• a(0) = 4; a(n) = Pell(4*n)/Pell(n) for n > 0.at n=6A383740
• Square array A(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of g.f. x/(1 - A002203(k)*x + (-1)^k*x^2).at n=59A383742