2446677

Appears in sequences

• a(n) = 2*a(n-1) - (-1)^n for n > 0, a(0)=2.at n=20A062092
• Numbers k such that A081252(m)/m^2 has a local minimum for m = k.at n=20A081253
• Expansion of (1+x-x^2)/((1-x)*(1-4*x^2)).at n=21A097163
• a(n) = (n + 2/3)*2^(n-1) - 1/2 - (-1)^(n-1)*(1/6).at n=17A127980
• A007318^(-1) * A133648.at n=20A133649
• a(n) = a(n-1) + 4a(n-2) - 4a(n-3).at n=21A136326
• Lexicographically earliest sequence such that the sequence and its first and second differences share no terms, and the 3rd differences are equal to the original sequence.at n=20A202349
• a(n) = (7*4^n - 1)/3.at n=10A206374
• Expansion of (1+2*x+3*x^2-x^3)/((1-x)*(1+x)*(1-2*x)*(1+2*x)).at n=21A221049
• a(0) = 2, a(1) = 2; for n > 1, a(n) = a(n-1) + 2*a(n-2) + 3.at n=20A290604