34591

Properties

Appears in sequences

• a(n) = T(n, 2*n-6), T given by A027960.at n=15A027968
• Primes of form k^2 - 5.at n=37A028877
• a(n) = A007290(n+2) - 1 = 2*C(n+2,3) - 1.at n=46A108766
• Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,2 3,0 4,0 5,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155434
• Primes of the form 9n^2 - 5.at n=12A201960
• Numbers that divide exactly two Euclid numbers.at n=27A297891
• Numbers m that generate rotationally symmetrical XOR-triangles T(m) that have central triangles of zeros.at n=31A334769
• Numerators of the partial alternating sums of the reciprocals of the sum of divisors function (A000203).at n=12A357845
• Numerators of the partial alternating sums of the reciprocals of the sum of divisors function (A000203).at n=14A357845
• Lexicographically earliest sequence of primes whose partial products lie between noncomposite numbers.at n=42A359948
• Prime numbersat n=3695