22951

Appears in sequences

• Denominators of continued fraction convergents to sqrt(231).at n=4A041431
• Denominators of continued fraction convergents to sqrt(924).at n=8A042787
• Whitney number of level n of the lattice of the ideals of the fence of order 2 n + 1.at n=12A051291
• Largest Whitney number of Fibonacci lattices J(Z_n).at n=25A077419
• Number of partitions of n such that the set of even parts has only one element.at n=48A090867
• Expansion of g.f. x*(1-x)/(1-4*x-2*x^2+x^3).at n=7A100295
• Number of (n+1) X (1+1) 0..1 arrays with every 2 X 2 subblock having a single 1 or two 1s on the same edge or main diagonally.at n=9A251285
• Numerators of coefficients in expansion of (sinh x)/(1 + cos(sqrt(x))).at n=6A279307
• Number of conjugacy classes for a non-abelian group of order p^3, where p is prime: a(n) = p^2 + p - 1 where p = prime(n).at n=35A319597
• a(n) is the number of subsets of {1,2,...,n} with at least two elements and the difference between successive elements at least 6.at n=38A335184
• Number of wedged n-spheres in the homotopy type of the neighborhood complex of Kneser graph KG_{3,n}.at n=14A342737
• G.f. A(x) satisfies A(x) = 1 + x^5*A(x)^5 / (1 - x*A(x)).at n=24A365702