43279

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 47 ones.at n=4A031815
• Expansion of Product_{k > 0} (1 + f(k)*x^k), where f(k) = A147952(A004001(k)).at n=42A147982
• Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,1 4,2 5,3 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155405
• (1, 4, 7, 10, 13, ...) convolved with (1, 0, 4, 7, 10, 13, ...); given A016777 = (1, 4, 7, 10, 13, ...).at n=31A179905
• Numbers k such that sigma(k) - k - 1 is a perfect number.at n=12A293992
• a(n) = 3*binomial(n,4) - 6*binomial(n,3) + 4*binomial(n,2) - 2.at n=28A335694