34960

Appears in sequences

• Equivalent of the Kurepa hypothesis for left factorial.at n=6A052201
• E.g.f.: exp(4x)/(1-x).at n=6A053487
• Number of inequivalent n X n matrices over GF(4) under action of dihedral group of the square D_4.at n=3A054751
• Square array of numbers related to the incomplete gamma function, read by antidiagonals.at n=61A080955
• Binomial transform of [1, 7, 17, 17, 6, 0, 0, 0, ...].at n=18A132117
• Values of n*d(k)*sopf(k) associated with A134382.at n=22A134386
• Terms of A061039 that are multiple of 10, in the order in which they appear.at n=37A146762
• Consider the base-9 Kaprekar map n->K(n) defined in A165110. Sequence gives numbers belonging to cycles, including fixed points.at n=11A165115
• Consider the base-9 Kaprekar map n->K(n) defined in A165110. Sequence gives numbers belonging to cycles of length greater than 1.at n=10A165117
• Consider the base-9 Kaprekar map n->K(n) defined in A165110. Sequence gives least elements of each cycle, including fixed points.at n=5A165119
• Consider the base-9 Kaprekar map n->K(n) defined in A165110. Sequence gives least elements of each cycle of length > 1.at n=4A165121
• Consider the base-9 Kaprekar map x->K(x) described in A165110. Sequence gives the smallest number that belongs to a cycle of length n under repeated iteration of this map, or -1 if there is no cycle of length n.at n=4A165126
• Smallest member of cycle corresponding to n-th term of A165127.at n=5A165128
• Number of inequivalent ways to color a 3 X 3 checkerboard using at most n colors allowing rotations and reflections.at n=4A217331
• Numbers equal to the sum of their proper divisors d such that d mod 3 = 2.at n=1A272715
• Array read by antidiagonals: T(n,k) is the number of k-colorings of an n X n grid, up to rotations and reflections.at n=31A343097
• Number of Qbar-isomorphism classes of elliptic curves E/Q with good reduction outside the first n prime numbers.at n=6A368080