18499

Appears in sequences

• Numerators of continued fraction convergents to sqrt(88).at n=9A041156
• Numerators of continued fraction convergents to sqrt(352).at n=5A041666
• Fibonacci sequence with a(1) = 7 and a(2) = 26.at n=15A098127
• Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,4,1,0 for x=0,1,2,3,4.at n=9A196984
• Hilltop maps: number of n X 3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 n X 3 array.at n=4A219073
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 nXk array.at n=25A219078
• Hilltop maps: number of 5Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 5Xn array.at n=2A219082
• a(n) = G_n(5), where G_n(k) is the Goodstein function defined in A266201.at n=16A266204
• a(n) = 2*a(n-1) - a(n-2) + 2*a(n-4) - a(n-5) + a(n-7) - a(n-8) - a(n-10) for n >= 10, where a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 11, a(4) = 18, a(5) = 31, a(6) = 52, a(7) = 89, a(9) = 151, a(9) = 257.at n=17A289004
• Semiprimes of the form k^2 + 3.at n=30A360740