131585

Appears in sequences

• Numbers that are the sum of 5 nonzero 8th powers.at n=38A003383
• a(n) = 2 * (4^n + 2^n) + 1.at n=8A085601
• Expansion of (1 + 4*x - 6*x^2 - 16*x^3 + 20*x^4)/((1-x)*(1-2*x)*(1+2*x)*(1-2*x^2)).at n=17A171663
• Gaussian norm of 1+(1+i)^n.at n=17A238187
• Number of pieces after a sheet of paper is folded n times and cut diagonally.at n=18A257418
• Square array read by descending antidiagonals: T(n,k) = ((2^(n+1) + 1)^(k-1) + 1)/2.at n=52A266577
• a(0)=2; for n > 0, a(n) = 2^(2*n-1) + 2^n + 1.at n=9A343175