42480

Appears in sequences

• Denominator in Feinler's formula for unsigned Bernoulli number |B_{2n}|.at n=29A002444
• a(n) = ceiling(10000*log_2(n)).at n=18A004270
• Number of Hamiltonian rooted triangulations with n internal nodes and 5 external nodes.at n=4A005979
• Base 8 digital convolution sequence.at n=11A033645
• 9 times octagonal numbers: a(n) = 9*n*(3*n-2).at n=40A064201
• a(1) = 4, a(n+1) = the smallest multiple of composite(n+1) beginning with a(n).at n=4A085954
• a(1) = 4, a(n+1) = the smallest multiple of composite(n+1) beginning with a(n).at n=5A085954
• Numbers that have exactly eight prime factors counted with multiplicity (A046310) whose digit reversal is different and also has 8 prime factors (with multiplicity).at n=3A109028
• Molecular topological indices of the crossed prism graphs.at n=11A192793
• p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - S^2 - S^3.at n=13A291233
• Number of nX4 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=9A304054
• a(n) is the smallest positive integer k, such that set of pairwise gcd of k, k+1, ..., k+n has a cardinality of n.at n=23A356371
• Array read by antidiagonals: T(n,k) is the number of Hamiltonian rooted triangulations with n internal nodes and k + 3 external nodes, n >= 0, k >= 0.at n=25A391153