8421376

Appears in sequences

• a(n) = (8^n + 4^n)/2.at n=8A081337
• Expansion of (1-x-4x^2)/((1-2x)(1-8x^2)).at n=16A098657
• Numbers k such that phi(k) is a perfect 11th power.at n=18A114573
• a(n) = n^4*(n^2 + 1)/2.at n=16A168192
• a(n) = n^8*(n^4 + 1)/2.at n=4A170776
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 390", based on the 5-celled von Neumann neighborhood.at n=24A287982
• a(n) = (4^n - 2^n) / Clausen(n, 1).at n=16A363403