26513

Properties

Appears in sequences

• Half-quartan primes: primes of the form p = (x^4 + y^4)/2.at n=13A002646
• Number of solutions to k_1 + 2*k_2 + ... + n*k_n = 0, where k_i are from {-1,0,1}, i=1..n.at n=13A007576
• Numbers k such that the continued fraction for sqrt(k) has period 99.at n=23A020438
• Largest coefficient in expansion of Product_{i=1..n} (1 + q^i + q^(2i)).at n=12A039826
• Duplicate of A007576.at n=13A086821
• Triangle read by rows: T(n,k) is the number of binary sequences of length n containing k subsequences 0110 (n,k >= 0).at n=47A118890
• Number of binary sequences of length n containing exactly one subsequence 0110.at n=16A118892
• Primes p such that q-p = 26, where q is the next prime after p.at n=13A124594
• Column l=3 of irregular triangle in A133709.at n=12A133710
• Primes of the form 3n^2 + 5.at n=24A201478
• Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=5A222518
• Number of nX6 0..3 arrays with exactly floor(nX6/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=3A222520
• T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=39A222522
• T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=41A222522
• Sixth prime p such that (p+n)^2+n is prime but (p+j)^2+j is not prime for all 0<j<n.at n=20A238678
• Numbers that are the smallest of four consecutive primes, no three of which sum to a nonprime.at n=10A298763
• Number of partitions of n into 9 or more distinct parts.at n=43A347576
• Primes p such that neither g-1 nor g+1 is prime, where g is the gap from p to the next prime.at n=22A355485
• Prime numbersat n=2912