19555

Appears in sequences

• Smallest k such that n^8+k^8, n^4+k^4, n^2+k^2, n+k are simultaneously prime.at n=21A071564
• Values of n such that L(18) and N(18) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=39A227521
• Values of n such that L(20) and N(20) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=51A227523
• Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.at n=7A304351
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.at n=58A304355
• Number of partitions of n into an odd number of parts such that the set of even parts has only one element.at n=50A341495
• Number of partitions of n with exactly one repeated part and that part is odd.at n=50A341497