33860

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 92.at n=3A031770
• Number of primes less than 100000n.at n=3A038814
• a(n) = T(n,n-5), array T as in A055801.at n=41A055805
• Interprimes which are of the form s*prime, s=20.at n=30A075295
• Sum of the Strahler numbers of all full binary trees with n internal vertices.at n=9A127152
• Irregular triangle read by rows: the number of hydrocarbon structures that can be drawn with a given number of carbons and units of unsaturation.at n=57A134819
• Number of binary strings of length n with no substrings equal to 0001 0011 or 0111.at n=18A164455
• List of fixed points of the base-6 Kaprekar map A165051.at n=4A165055
• Consider the base-6 Kaprekar map n->K(n) defined in A165051. Sequence gives numbers belonging to cycles, including fixed points.at n=13A165056
• Consider the base-6 Kaprekar map n->K(n) defined in A165051. Sequence gives least elements of each cycle, including fixed points.at n=7A165060
• Smallest member of cycle corresponding to n-th term of A165068.at n=7A165069
• Number of permutations of length n which avoid the patterns 321 and 1324.at n=21A179257
• Number of 0..6 arrays of length n with each element differing from at least one neighbor by 2 or more, starting with 0.at n=6A221513
• T(n,k)=Number of 0..k arrays of length n with each element differing from at least one neighbor by 2 or more, starting with 0.at n=72A221515
• Number of 0..n arrays of length 7 with each element differing from at least one neighbor by 2 or more, starting with 0.at n=5A221518
• Number of n X n 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=6A301958
• Number of n X 7 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=6A301963
• Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=6A301969
• a(n) = Sum_{k=1..n} floor(n/k)^5.at n=7A318744
• a(n) = Sum_{k=1..n} gcd(k, n)^5.at n=7A343499