20266

Appears in sequences

• Poly-Bernoulli numbers B_n^(k) with k=-3.at n=6A027650
• Low temperature series for spin-1/2 Ising partition function on 4D simple cubic lattice.at n=18A030045
• Values of m, the main key or generating number for Pythagorean triangles in which S (the odd short leg) and U (the hypotenuse) are twin primes.at n=42A051891
• Numbers k such that k! + (k+1)! - 1 is prime.at n=24A087146
• Array read by antidiagonals: poly-Bernoulli numbers B(-k,n).at n=48A099594
• Array read by antidiagonals: poly-Bernoulli numbers B(-k,n).at n=51A099594
• Number of monic polynomials with integer coefficients of degree n with all roots on the unit circle; number of products of cyclotomic polynomials of degree n.at n=19A120963
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, -1, 0), (0, 1, 1), (1, 1, -1)}.at n=9A148959
• Numbers k such that 5^k mod 2^k is prime.at n=30A178996
• Number of permutations of 1..n with i-6<=p(i)<=i+3.at n=8A179341
• a(n) = (n^3 - 2*n^2 + 3*n + 2)/2.at n=35A189890
• Expansion of ((sqrt(2);x)_inf + (-sqrt(2);x)_inf - 2)/4, where(a;q)_inf is the q-Pochhammer symbol.at n=51A278298
• Poly-Bernoulli numbers B_n^(k) with k = -6.at n=3A283812
• Numbers k such that (19*10^k + 737)/9 is prime.at n=18A293536
• Triangle T(n,k) in which row n lists in increasing order the number of acyclic orientations of complete multipartite graphs K_lambda, where lambda is a partition of n into distinct parts; triangle T(n,k), n>=0, k = 1..A000009(n), read by rows.at n=28A370614