4199040

Appears in sequences

• a(n) = Sum_{k=0..2n} (k+1) * A026519(n, k).at n=14A027266
• a(n) = Sum_{k=0..2n} (k+1)*T(n,k), where T is given by A026536.at n=14A027271
• a(n) = (2*n + 1)*6^n.at n=7A199299
• Smallest Meertens number in base n, or -1 if none exists.at n=7A246532
• Number of length n+2 0..1 arrays with the sum of the maximum minus the median of adjacent triples multiplied by some arrangement of +-1 equal to zero.at n=20A251928
• T(n, m), denominators of coefficients in a power/Fourier series expansion of the plane pendulum's exact phase space trajectory.at n=32A273507