28320

Appears in sequences

• Coordination sequence for root lattice B_6.at n=4A022148
• Convolution of composite numbers and (F(2), F(3), F(4), ...).at n=15A023649
• Coordination sequence for diamond structure D^+_6. (Edges defined by l_1 norm = 1.)at n=8A035879
• Occurrences of most frequently occurring number in 1-to-n 5-dimensional multiplication table.at n=31A057344
• Occurrences of most frequently occurring number in 1-to-n 5-dimensional multiplication table.at n=32A057344
• Occurrences of most frequently occurring number in 1-to-n 5-dimensional multiplication table.at n=33A057344
• Numbers k such that Omega(k) = Omega(k-1) + Omega(k-2) + Omega(k-3) + Omega(k-4) where Omega(k) denotes the number of prime factors of k, counting multiplicity.at n=26A078095
• Starting positions of strings of three 9's in the decimal expansion of Pi.at n=34A083642
• Square array A(n,k) read by antidiagonals: coordination sequence for lattice B_n.at n=40A103883
• Nonnegative k such that 7*k^2 + 7*k + 1 is a square.at n=4A105040
• Define a(1)=0, a(2)=0, a(3)=15, a(4)=111 then a(n) = 254*a(n-2) - a(n-4) + 126 also sequence such that 7*a(n)*(a(n) + 1) + 1 = a square.at n=5A105051
• Square array, read by antidiagonals, where row n equals the coordination sequence of B_n lattice, for n >= 0.at n=59A108998
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 8.at n=31A136885
• Strongly refactorable numbers: numbers n such that if n is divisible by d, it is divisible by the number of divisors of d.at n=33A141586
• 6 times octagonal numbers: a(n) = 6*n*(3*n-2).at n=40A153796
• a(n) = number of ordered triples (w,x,y) such that w,x,y are all in {0,...,n} and the numbers |w-x|, |x-y|, |y-w| are distinct.at n=31A212963
• Positions of incrementally largest terms in the continued fraction for Euler's constant gamma (A002852).at n=13A224849
• Numbers k such that 7*R_k - 40 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=7A256828
• Number of triple-crossings of diagonals in the regular 2n-gon.at n=30A260417
• Indices of rows of triangle A262432 where the maximum term of the row is a new record.at n=29A262464