27133

Appears in sequences

• Strong pseudoprimes to base 21.at n=12A020247
• Strong pseudoprimes to base 28.at n=12A020254
• Strong pseudoprimes to base 30.at n=19A020256
• Strong pseudoprimes to base 40.at n=22A020266
• Strong pseudoprimes to base 58.at n=21A020284
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 92 ones.at n=21A031860
• Numbers which are sums of two, three and four cubes.at n=32A085337
• Numbers which are sums of two, three, four and also sums of five cubes.at n=31A085338
• Number of distinct lines through the origin in 3-dimensional cube of side length n.at n=31A090025
• A Chebyshev transform of A099459 associated to the knot 9_48.at n=6A099460
• Number of (n+1) X 8 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.at n=11A186460
• Right edge of the triangle in A033291.at n=42A192736
• Number of n X 2 nonnegative integer arrays with upper left 0 and every value within 3 of its city block distance from the upper left and every value increasing by 0 or 1 with every step right or down.at n=13A252822
• Number of maximal irredundant sets in the n-gear graph.at n=10A290640
• Semiprimes k = pq such that p^k == p (mod k) and q^k == q (mod k).at n=27A294169
• MM-numbers of crossing set partitions.at n=31A324324
• Number of patterns of length n matching the pattern (1,1,2).at n=7A335509
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} gcd(x_1, n)/gcd(x_1, x_2, x_3, n).at n=20A373060
• Number of integer partitions of n having a permutation with all equal run-lengths.at n=40A383013