142857

Appears in sequences

• Periods of reciprocals of A006883, starting with first nonzero digit.at n=1A004042
• Kaprekar numbers: positive numbers n such that n = q+r and n^2 = q*10^m+r, for some m >= 1, q >= 0 and 0 <= r < 10^m, with n != 10^a, a >= 1.at n=24A006886
• Numbers k such that k and 2*k are anagrams.at n=4A023086
• Numbers k such that k and 4*k are anagrams.at n=33A023088
• Numbers k such that k and 5*k are anagrams.at n=1A023089
• Numbers k such that k and 6*k are anagrams.at n=22A023090
• a(n) is least k such that k and 5k are anagrams in base n (written in base 10).at n=4A023097
• a(n) = floor(10^6/n).at n=6A033426
• Numbers that are proper divisors of the number you get by rotating digits right once.at n=2A034089
• The periodic part of the decimal expansion of 1/n. Any initial 0's are to be placed at end of cycle.at n=6A036275
• a(n) = n(n+7)(n+1)(n^2+2n+12)/120.at n=25A051746
• The full list of 6-Kaprekar numbers.at n=3A053397
• Another version of the Kaprekar numbers (A006886): n such that n = q+r and n^2 = q*10^m+r, for some m >= 1, q >= 0 and 0 <= r < 10^m, with n != 10^a, a >= 1 and n an m-digit number.at n=21A053816
• a(n) = floor(10^(n-1)/n).at n=6A056159
• Periodic part of decimal expansion of reciprocal of n-th prime (leading 0's omitted).at n=3A060282
• Periodic part of decimal expansion of reciprocal of n-th prime (leading 0's moved to end).at n=3A060283
• Periodic part of decimal expansion of 1/n (leading 0's omitted).at n=6A060284
• Numbers m that divide the concatenation of m-1 and m+1.at n=11A069871
• Periodic part of decimal expansion of 1/p for those primes having a periodic part of even length.at n=0A086999
• Numbers k that are divisors of the number formed by concatenating (k-1), k and (k+1), in that order.at n=41A088877