16777218

Appears in sequences

• a(n) = 2^n + 2.at n=24A052548
• Number of elements in the continued fraction for Sum_{k=0..n} 1/2^2^k.at n=25A056469
• a(n) = A089709(n+1)/A089709(n).at n=24A089985
• Number of ways of 3-coloring an annulus consisting of n zones joined like a pearl necklace.at n=23A092297
• a(0) = 2, a(n) = 2^n + 2 for n>=1.at n=24A133140
• Binomial transform of [1, 5, -1, 5, -1, 5, ...]. Inverse binomial transform of A134350.at n=23A134351
• a(n) = smallest number that leads to a new cycle under the base-8 Kaprekar map of A165090.at n=17A165107
• Sequence defined by a(0)=a(1)=a(2)=1, a(3)=2, a(4)=6 and the formula a(n)=2^(n-2)+2 for n>=5.at n=26A174316
• a(n) = 4^(n-1) + 2: Number of acute angles after n iterations of the Koch snowflake construction.at n=12A178789
• Expansion of (1 + 2*x + 6*x^2)/(1 - x - x^2 - 2*x^3) in powers of x.at n=23A186575
• Numbers that can be represented as both a^x + x and b^y + b, for some a, b, x, y > 1.at n=26A253914
• a(0) = 3, a(n+1) = 2*a(n) + periodic sequence of length 2: repeat [-5, 4].at n=24A280293
• a(n) is the next Ulam number (A002858) after 2^(n-1).at n=25A347212