81819

Appears in sequences

• Divisors of 9999999999.at n=22A027895
• Another 3-way generalization of series-parallel networks with n labeled edges.at n=6A058562
• a(n) = n^2 concatenated with reverse(n^2) divided by 11.at n=30A084009
• Numbers k that are divisors of the number formed by concatenating (k-1), k and (k+1), in that order.at n=33A088877
• Let n be the number whose square n^2 has the decimal expansion { d(1) d(2) ... d(D) }, and let q be the corresponding number whose decimal expansion is { d(2) d(3) ... d(D) d(1)}. Sequence lists numbers n dividing q.at n=48A177928
• Numbers n dividing every cyclic permutation of n^2.at n=25A178028
• Numbers n dividing every cyclic permutation of n^4.at n=34A242740
• Numbers k of the form a - b + c, such that k^3 equals the decimal concatenation a//b//c and numbers k, b, and c have the same number of digits.at n=21A259379
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 846", based on the 5-celled von Neumann neighborhood.at n=16A284298
• Numbers m such that the largest digit in the decimal expansion of 1/m is 2.at n=24A341383
• Numbers whose reciprocals have period 10.at n=8A345319