30912

Appears in sequences

• Triangle of D'Arcais numbers.at n=22A008298
• Theta series of direct sum of 2 copies of f.c.c. lattice.at n=28A008663
• a(n) = 6^n/8 - 4^(n-1) + 2^(n-3).at n=7A016283
• A diagonal of triangle in A008298.at n=5A059356
• Stirling2 triangle with scaled diagonals (powers of 2).at n=30A075497
• Signed triangle of D'Arcais numbers (A008298) : coefficients of r in the polynomials generated by the series coefficients of z^n in Product[(1-z^k)^r, {k,1,Inf}]*(n!).at n=30A078521
• A Fibonacci convolution.at n=11A099485
• Weight distribution of quadratic residue code of length 23 over GF(3).at n=11A112641
• Weight distribution of quadratic residue code of length 23 over GF(3).at n=12A112641
• Triangle read by rows: T(n,k) is the number of binary trees (i.e., a rooted tree where each vertex has either 0, 1, or 2 children; and, when only one child is present, it is either a right child or a left child) with n edges and k pairs of adjacent vertices of outdegree 2.at n=22A126219
• Number of binary trees (i.e., rooted trees where each vertex has either 0, 1, or 2 children; and, when only one child is present, it is either a right child or a left child) with n edges and no adjacent vertices of outdegree 2.at n=10A126220
• a(n) = denominator of Product_{k=1..n} k^mu(n+1-k), where mu(k) = A008683(k).at n=23A130089
• Number of permutations of floor(i*7/3), i=0..n-1, with all sums of 4 adjacent terms unique.at n=7A152339
• Numbers with distinct digits appearing in partition of decimal expansion of square root of 2. (A002193).at n=29A167834
• a(2*n) = (n+1)*a(n), a(2*n+1) = (n+1)*a(n+1), with a(1) = 1.at n=44A171609
• a(n) = Sum_{k=0..n-1} C(n-1,k)^(k+1) * n/(n-k).at n=5A181075
• Number of 6-element nondividing subsets of {1, 2, ..., n}.at n=29A187493
• Numbers with prime factorization pqrs^6.at n=15A190292
• Numbers such that sigma(phi(tau(n)))=tau(phi(sigma(n))).at n=30A226119
• Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3.at n=5A264558