83161

Appears in sequences

• Becomes prime after n iterations of f(x) = sigma(x)-1 (least inverse of A039655).at n=25A039656
• Denominators of continued fraction convergents to sqrt(483).at n=6A041923
• a(n) is the least multiple of n such that a(n) = 1 mod k for all integers k with 1 < k < n and k relatively prime to n.at n=12A055006
• Smallest number that is centered polygonal in exactly n ways.at n=19A063773
• a(n) is smallest positive integer multiple of n-th prime, say k*prime(n), such that k*prime(n) == 1 (mod j) for each integer j with 1 < j < prime(n).at n=5A094998
• Highly composite numbers + 1.at n=28A135372
• The first number that is (at least) n-fold intrinsically 3-palindromic (represented in base ten).at n=10A171702
• a(n) is the smallest integer with at least n palindromic representations of length >= 3 in bases b >= 2.at n=10A275220
• a(n) is the smallest integer with at least n palindromic representations of length >= 3 in bases b >= 2.at n=11A275220
• a(n) = the least integer that is centered polygonal in exactly n ways.at n=18A279830
• List of numbers n such that A039654(n) reaches a new record high.at n=39A292113
• List of numbers n such that A039655(n) reaches a new record high.at n=12A292114
• a(n) is the smallest integer k > 1 that satisfies k mod j <= 1 for all integers j in 1..n.at n=13A361246
• a(n) is the smallest integer k > 1 that satisfies k mod j <= 1 for all integers j in 1..n.at n=14A361246
• Number of regions in a regular 2n-gon when all vertices are connect by straight lines except for the n lines joining diametrically opposite vertices.at n=19A368813