69160

Appears in sequences

• Expansion of Product_{k>=1} (1 - x^k)^14.at n=23A010821
• (1+e)-harmonic numbers: harmonic mean of (1+e)-divisors is an integer.at n=18A053783
• The Wiener index of the P_3 X P_n grid, where P_m is the path graph on m nodes. The Wiener index of a connected graph is the sum of distances between all unordered pairs of nodes in the graph.at n=34A180569
• 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 214", based on the 5-celled von Neumann neighborhood.at n=32A286736
• Number of n X 7 0..1 arrays with every element equal to 2, 3 or 5 king-move adjacent elements, with upper left element zero.at n=7A297875
• Numbers k such that N = k^6 is a twin rank (cf. A002822: 6N +- 1 are twin primes).at n=21A326236
• E.g.f. A(x) satisfies A'(x) = 1 - log(1-x) * A(2*x)/2.at n=8A355235
• Numerators of coefficients in expansion of (1 + x)^(2/3).at n=11A364658
• Square array A(n, k) = A064987(A246278(n, k)), read by falling antidiagonals; A064987(n) = n*sigma(n), applied to the prime shift array.at n=50A379499
• Square array A(n, k) = A249670(A246278(n, k)), read by falling antidiagonals; A249670(n) = A017665(n)*A017666(n), applied to the prime shift array.at n=50A379500