193536

Appears in sequences

• Number of invertible 2 X 2 matrices mod n.at n=27A000252
• Denominators of central difference coefficients M_{3}^(2n+1).at n=3A002672
• Coefficients for numerical integration.at n=2A006685
• Theta series of {D_9}* lattice.at n=49A008424
• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*4^j.at n=33A038222
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*3^j.at n=30A038233
• Denominators in expansion of exp(exp(x)-1)/(2-x).at n=9A058816
• Expansion of a Schwarzian ({f_{27|3}, tau} / (4*Pi)^2) in powers of q^3.at n=15A062248
• 14-almost primes (generalization of semiprimes).at n=24A069275
• a(n) = least positive integer k satisfying Omega(k) = Omega(k+1)+Omega(k+2)....+Omega(k+n), where Omega = A001222 = number of prime factors, counting multiplicity.at n=5A076804
• Expansion of (1-x)^(-1)/(1-x+2*x^2+2*x^3).at n=23A077878
• Number of permutations divided by the number of (binary) heaps on n elements.at n=16A132862
• The lower left triangle of the ED1 array A167546.at n=24A167557
• Triangle T(n,k) for solving differential equation A'(x)=G(A(x)), G(0)!=0.at n=52A190015
• Number T(n,k) of permutations of n elements with no fixed points and largest cycle of length k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=60A211871
• Fixed points of A225546.at n=40A225547
• Theta series of 16-dimensional lattice OBW16, an overlattice of the Barnes-Wall lattice BW16.at n=7A239917
• Triangle read by rows: terms T(n,k) of a binomial decomposition of 2^n-1 as Sum(k=0..n)T(n,k).at n=33A244125
• Denominators of central difference coefficients M_{5}^(2n+1).at n=3A323994
• Least value m > 0 such that Diophantine equation z^2 - y^2 - x^2 = m, when the positive integers, x, y and z are consecutive terms of an arithmetic progression, has exactly n solutions.at n=33A334567