23016

Appears in sequences

• Number of atoms in cluster of n layers around C_60.at n=18A063498
• a(n) = 7 + floor((2 + Sum_{j=1..n-1} a(j))/3).at n=28A120153
• Orthogonal polynomials with all zeros integers from 2*A000217.at n=52A129467
• Coefficients of the v=1 member of a family of certain orthogonal polynomials.at n=42A130182
• Triangle T(n, k) = A172452(n) - A172452(k) - A172452(n-k), read by rows.at n=60A172970
• Numbers n with property that n+41, n^2+41 and n^3+41 are all primes.at n=14A175260
• Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(1,1)|0<k<=3} which never go above the line y-x.at n=6A175896
• Number of n-bead necklaces labeled with numbers -1..1 not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.at n=13A209066
• Triangle with entry a(n,m) giving the total number of bracelets of n beads (D_n symmetry) with n colors available for each bead, but only m distinct colors present, with m from {1, 2, ..., n} and n >= 1.at n=30A214306
• a(n) is the number of all three-color bracelets (necklaces with turning over allowed) with n beads and the three colors are from a repertoire of n distinct colors, for n >= 3.at n=5A214310
• Number of (n+1) X (5+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=5A235014
• Number of (n+1) X (6+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=4A235015
• Number of length n arrays of permutations of 0..n-1 with each element moved by -n to n places and every four consecutive elements having its maximum within 4 of its minimum.at n=20A263709
• p-INVERT of (1,1,0,0,0,0,...), where p(S) = (1 - S^2)(1 - S)^2.at n=13A291409
• Numbers k such that A090086(k), the smallest pseudoprime to base k (not necessarily exceeding k), is a Carmichael number.at n=37A293203
• a(n) = Sum_{k=1..n} binomial(k+2,2) * floor(n/k).at n=45A366984
• E.g.f. satisfies log(A(x)) = x*A(x)^2 * (exp(x*A(x)^2) - 1).at n=6A371023
• Triangle read by rows: Related to the Euler numbers.at n=39A371994