34415

Appears in sequences

• a(1) = 4, a(n+1) is the largest composite number < 2a(n).at n=14A076995
• Numbers k such that 1 + (x + x^3 + x^5 + x^7 + ... + x^(2*k+1)) is irreducible over GF(2).at n=34A107220
• Numbers m such that (partial sums of m times (m 1's)) + 1 is prime; or m such that Sum_{k=1..m} A053422(k) + 1 is prime.at n=7A121914
• Wiener index of a benzenoid consisting of a double-step spiral chain of n hexagons (n>=2, s=21; see the Gutman et al. reference).at n=17A193397
• Number of length n+1 0..4 arrays with the sum of the minimum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.at n=5A250415
• T(n,k)=Number of length n+1 0..k arrays with the sum of the minimum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.at n=41A250419
• Number of length 6+1 0..n arrays with the sum of the minimum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.at n=3A250423
• Number of 6-cycles in the n-triangular honeycomb obtuse knight graph.at n=17A290392
• G.f. A(x) satisfies A(x) = 1 / ((1 + x) * (1 - 3 * x * A(x)^2)).at n=5A349256