42557

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 37.at n=3A031625
• Number of n-bit strings that contain no more than 4 zeros and no more than 2 leading and 2 trailing zeros.at n=15A102026
• List of triples of primes with common difference 24.at n=8A128383
• Number of (w,x,y,z) with all terms in {1,...,n} and w*x<=y*z+1.at n=17A212053
• Hilltop maps: number of n X 1 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..2 n X 1 array.at n=15A218199
• Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 n X 2 array.at n=7A218420
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 nXk array.at n=37A218426
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 nXk array.at n=43A218426
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 nXk array.at n=43A218592
• Number of nX5 0..1 arrays with every element equal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.at n=8A297904
• Expansion of Product_{k>=1} (Product_{j=1..k} (1 + x^(k*j))^j).at n=37A327063
• Numbers k such that (29^k - 2^k)/27 is prime.at n=8A376470
• Prime numbersat n=4450