27758

Appears in sequences

• Graham-Sloane-type lower bound on the size of a ternary (n,3,5) constant-weight code.at n=19A030505
• Indices of primes in A001644 (the Lucas 3-step numbers).at n=32A104576
• Alternating sum of the Fibonacci numbers multiplied by their (combinatorial) indices.at n=17A120940
• Number of n-node unlabeled rooted trees with thickening limbs.at n=22A245152
• Number of length n+4 0..5 arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two.at n=13A248984
• G.f. satisfies A(x) = 1 + x * (1 + x)^2 * A(x * (1 + x)).at n=9A360887
• Number of non-quanimous subsets of {1..n}, meaning there is only one set partition with all equal block-sums.at n=16A371789
• The number of irreducible zero-sum subsets of T(n) = {-2*n+1, -2*n+3, ..., -3, -1, 1, 3, ..., 2*n-3, 2*n-1} that contain -2*n+1 but not 2*n-1.at n=19A390083