70644

Appears in sequences

• Number of sublattices of index n in generic 4-dimensional lattice.at n=40A038991
• Number of rods required to make a 3-D cube of side length n.at n=28A059986
• Negative value of coefficient of x^(n-2) in the characteristic polynomial of a certain n X n integer circulant matrix.at n=27A127407
• Number of maximally-clustered hexagon-avoiding permutations in S_n; the maximally-clustered hexagon-avoiding permutations are those that avoid 3421, 4312, 4321, 46718235, 46781235, 56718234, 56781234.at n=10A129776
• a(n) = (1/2)*(F(n+2)-1)*(F(n+2)-2) + F(n), where F() are the Fibonacci numbers.at n=11A131569
• a(n) = 1 + prime(n) + prime(n)^2 + prime(n)^3.at n=12A131991
• Coefficients of derivatives of MacMahon polynomials (A060187): p(x,n)=2^n*(1 - x)^(1 + n)*LerchPhi[x, -n, 1/2]; p'(x,n)=(d/dx)p{x,n).at n=17A142707
• Exponential Riordan array (e^(x), x*A000108(x)).at n=51A185946
• Area A of the triangles such that A, the sides and one of the altitudes are four consecutive integers of an arithmetic progression d.at n=28A210645
• a(n) = (41^n - 1)/40.at n=4A218744
• Totient numbers (A002202) of the form 1 + k + k^2 + k^3 +...+ k^i (i > 1, k > 1).at n=20A282090
• Number of maximal irredundant sets in the n-cycle graph.at n=28A286954
• Smallest Brazilian composite in base n >= 2 which can be represented as a string of three or more 1's in this base.at n=39A325659
• The sum of divisors of the smallest cubefull number that is a multiple of n.at n=40A369720
• The sum of divisors of the smallest cubefull exponentially odd number that is divisible by n.at n=40A369758
• a(n) = sigma_1(n) * sigma_2(n).at n=40A379812
• First component A of the pairs (A, B), listed in increasing order, such that the multiset of digits of A union the multiset of digits of B equals the multiset of digits of A^2 and the multiset of digits of B^2, for some B >= A. Note that terms may be repeated.at n=36A389379
• The sum of the divisors of the smallest cube divisible by n.at n=40A390663