84915

Appears in sequences

• a(n) = -a(n-1) - 2*a(n-2).at n=36A001607
• Expansion of 1/(1 - 3*x + 4*x^2).at n=17A049072
• a(n) is the unique odd positive solution x of 2^n = 7x^2+y^2.at n=35A077020
• Number of permutations of length n which avoid the patterns 1234, 2431, 3241.at n=12A116789
• Numbers k such that sigma(k) = psi(k) + tau(k) + omega(k)^7.at n=7A392385