3670016

Appears in sequences

• Maximum m such that there are no two adjacent elements belonging to the same n-th power residue class modulo some prime p in the sequence 1,2,...,m (equivalently, there is no n-th power residue modulo p in the sequence 1/2,2/3,...,(m-1)/m).at n=17A000236
• Numbers that are not the sum of 4 nonzero squares.at n=39A000534
• a(n) = 7*2^n.at n=19A005009
• Numbers that have a unique partition into a sum of four nonnegative squares.at n=38A006431
• Number of Hamiltonian cycles in the directed graph with 2n nodes {0..2n-1} and edges from each i to 2i (mod 2n) and to 2i+1 (mod 2n).at n=27A027362
• Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*8^j.at n=34A038214
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*2^j.at n=29A038280
• Numbers k such that k = 2*phi(k) + phi(phi(k)).at n=37A063920
• Number of endofunctions on n labeled points constructed from k rooted trees.at n=29A066324
• Denominator of ((3 * n - 2)/(n^(2 * n - 1) * (2 * n - 1) * 4^(n - 1))).at n=3A067746
• 20-almost primes (generalization of semiprimes).at n=5A069281
• a(0) = 1, a(n) = (n + 4)*4^(n-1) for n >= 1.at n=10A079028
• Duplicate of A079028.at n=10A081104
• First differences of A109975.at n=20A111297
• Row sums of A125175.at n=21A125176
• n*(n-1)*4^n.at n=8A128798
• Binomial transform of [1, 6, 1, 6, 1, 6, ...].at n=20A135092
• a(n) = 8*a(n-2), with a(0) = 7, a(1) = 14.at n=13A135536
• Terms in A178335 not divisible by 10.at n=27A158204
• Triangle t(n,m)= (m+1)^n*binomial(n,m) if m <= n/2, otherwise t(n,m) = t(n,n-m).at n=39A167034