104448

Appears in sequences

• 13-almost primes (generalization of semiprimes).at n=28A069274
• Triangle read by rows: numbers of isomers of unbranched a-4-catapolyheptagons.at n=58A120653
• Numbers of isomers of unbranched a-4-catapolyheptagons - see Brunvoll reference for precise definition.at n=7A121140
• a(n) = ((4 + sqrt(18))*(4 + sqrt(8))^n + (4 - sqrt(18))*(4 - sqrt(8))^n)/8 .at n=6A164591
• Erroneous version of A376694.at n=8A177474
• Number of ways to arrange 7 nonattacking triangular rooks on an nXnXn triangular grid.at n=11A193985
• Numbers k such that (number of prime factors of k counted with multiplicity) less (number of distinct prime factors of k) = 10.at n=36A195069
• Number T(n,k) of permutations of {1,2,...,n} that result in a binary search tree of height k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=51A195581
• Number of (n+2) X 4 binary arrays avoiding patterns 001 and 101 in rows and columns.at n=13A202196
• Sum of median parts of all partitions of n into an odd number of parts.at n=44A211373
• a(n) = 2^(n-2)*(n-2)^2+2^(n-1).at n=10A217527
• The hyper-Wiener index of the dendrimer D_1[n], defined pictorially in the A. R. Ashrafi et al. reference.at n=1A224430
• A double binomial sum involving absolute values.at n=3A268151
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 94", based on the 5-celled von Neumann neighborhood.at n=22A285783
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 155", based on the 5-celled von Neumann neighborhood.at n=16A286115
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 324", based on the 5-celled von Neumann neighborhood.at n=16A287633
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 510", based on the 5-celled von Neumann neighborhood.at n=21A288808
• Number T(n,k) of permutations of [n] having k points that are fixed or reflected; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=47A335872
• a(n) = 6*a(n - 1) - 12*a(n - 2) + 8*a(n - 3) for n >= 5, a(0) = 1, a(1) = 7, a(2) = 24, a(3) = 70, a(4) = 193.at n=11A339254
• Number of subsets of {1..n} that cannot be linearly combined using nonnegative coefficients to obtain n.at n=26A365380