18056

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 67.at n=30A031565
• a(n) = floor(9^n/7^n).at n=39A094991
• Least positive k such that k * [RSA-2048]^n + 1 is prime, where RSA-2048 is the 617 decimal digit RSA challenge number A391940(54).at n=8A108881
• Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutations A127379/A127380 and A127381/A127382.at n=11A127384
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+127)^2 = y^2.at n=10A129992
• Numbers n such that 4n+3 is a palindromic prime.at n=39A193419
• Number of nX3 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=5A201230
• Number of nX6 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=2A201233
• T(n,k)=Number of nXk 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=30A201235
• T(n,k)=Number of nXk 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=33A201235
• Union of all unique coefficients of all powers of the g.f. A(x) of this sequence, starting with A(0)=2 and A'(0)=3.at n=67A262975
• Number of partitions of n^2 into exactly n nonzero squares.at n=21A319435