40365

Appears in sequences

• Numerators of continued fraction convergents to sqrt(126).at n=5A041228
• Numerators of continued fraction convergents to sqrt(504).at n=5A041962
• 9 times octagonal numbers: a(n) = 9*n*(3*n-2).at n=39A064201
• Odd numbers k such that abs(sigma(k)-2k) <= sqrt(k). Abundance-radius = abs(sigma(k)-2k) does not exceed square root of k and k is odd.at n=21A087415
• Triangle of numbers, called Y(1,3), related to generalized Catalan numbers A064063(n) = C(3;n).at n=24A116868
• Number of isomorphism classes of 6-regular multigraphs of order n, loops allowed.at n=6A129433
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (1, 0, -1), (1, 0, 0), (1, 1, -1)}.at n=10A148418
• Odd numbers n such that 2n/sigma(n) - 1 = 1/x for some positive integer x.at n=21A222263
• The hyper-Wiener index of the cyclic phenylene with n hexagons (n>=3).at n=6A224457
• Numbers n such that n^2 + (n+1)^2 + (n+2)^2 is equal to the sum of the heptagonal numbers H(m), H(m+1) and H(m+2) for some m.at n=2A251770
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 374", based on the 5-celled von Neumann neighborhood.at n=30A287908
• Deficient numbers k > 1 such that k*p is abundant for all primes p dividing k.at n=5A341358
• G.f. A(x) satisfies A(x) = (1 + 9*x*A(x)^7)^(1/3).at n=4A376282
• a(n) = 6 * (4*n)! / ((n+1)! * (3*n+1)!).at n=7A384585
• Numbers m with deficiency 90: sigma(m) - 2*m = -90.at n=5A389702