784198803

Appears in sequences

• a(n+1) - 3*a(n) + a(n-1) = (2/3)(1+w^(n+1)+w^(2n+2)), where w = exp(2 Pi I / 3).at n=22A071618
• a(n) = 3*a(n-1) + 5*a(n-2) + a(n-3).at n=14A120775
• Partial sums of odd Fibonacci numbers (A014437).at n=28A174542
• a(n) = numerator of Sum_{i=1..n} binomial(2n-i-1,i-1)/i.at n=21A175385
• Half the number of n X 2 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=21A185828
• Indices of triangular numbers (A000217) that are also centered pentagonal numbers (A005891).at n=14A254626
• Smallest nonnegative integer not expressible by the addition and subtraction of fewer than n Lucas numbers.at n=15A364754