18157

Appears in sequences

• Numerators of continued fraction convergents to sqrt(866).at n=6A042672
• Numbers m such that 5^m reversed is a prime.at n=11A058993
• Number of binary strings of length n with equal numbers of 00100 and 00110 substrings.at n=15A164235
• Numbers k such that (7*10^(2k+1) - 18*10^k - 7)/9 is prime.at n=13A183180
• Number of nX2 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.at n=7A199250
• T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.at n=37A199256
• T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.at n=43A199256
• Number of partitions p of n containing floor((min(p) + max(p))/2) as a part.at n=41A238482
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0.at n=49A267019
• Number of nX(n+1) arrays of permutations of n+1 copies of 0..n-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0.at n=4A267021
• Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo 5 and the upper left element equal to 0.at n=5A267024
• Numbers n such that n^1024 + (n+1)^1024 is prime.at n=30A274234
• Where the ratio A235027(n)/n obtains record values.at n=13A290078
• Squarefree k > 1 with sigma(sigma(sigma(k))) < 3*k + 1.at n=26A320513
• Number of ways the first n cubes can be partitioned into three sets with equal sums.at n=10A327448