18393

Appears in sequences

• Convolution of natural numbers with Beatty sequence for tau^2 A001950.at n=33A023542
• 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 90.at n=33A031588
• a(n) = a(n-1) + a(n-2) - a(n-3) + a(n-5).at n=33A107368
• Numbers whose square root in base 10 starts with 10 distinct digits.at n=9A113507
• Nonisomorphic catacondensed monoheptabenzenoids (see reference for precise definition).at n=8A121076
• a(n) = 38*n^2 + 1.at n=22A158593
• Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X n array.at n=3A221439
• Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 n X 4 array.at n=3A221442
• 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..1 nXk array.at n=24A221446
• Hilltop maps: number of 4Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..1 4Xn array.at n=3A221449
• Numbers n such that n^8+8 and n^8-8 are prime.at n=19A239503
• Number of nX3 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.at n=10A304671
• G.f. A(x) satisfies: A(x) = x*exp(A(-x) + A(-x^2)/2 + A(-x^3)/3 + A(-x^4)/4 + ...).at n=21A307365
• Sum of the fourth largest parts of the partitions of n into 10 squarefree parts.at n=54A326634
• Number of strict compositions of n with alternating parts strictly decreasing.at n=42A342343