892371480

Appears in sequences

• Denominators of coefficients for numerical differentiation.at n=23A002548
• Numbers k which, for some r, are r-digit maximizers of k/phi(k).at n=29A065800
• a(n) is the lcm of related numbers to n (counted in A073757): related = {divisor-set, RRS}.at n=23A083268
• a(1) = 1; a(n) = smallest positive unpicked integer such that n-k divides evenly into a(n)*a(k) for every k, 1 <= k <= n-1.at n=24A091861
• Denominator of partial sums of a certain series.at n=10A101029
• Least modulus with 2^n square roots of 1.at n=10A102476
• Increasing sequence obtained by union of two sequences A136354 and {b(n)}, where b(n) is the smallest composite number m such that m+1 is prime and the set of distinct prime factors of m consists of the first n primes.at n=16A136357
• Increasing sequence obtained by union of two sequences {b(n)} and {c(n)}, where b(n) is the smallest odd composite number m such that both m-2 and m+2 are prime and the set of distinct prime factors of m consists of the first n odd primes and c(n) is the smallest composite number m such that both m-1 and m+1 are primes and the set of the distinct prime factors of m consists of the first n primes.at n=15A136358
• a(n) is the smallest number m such that the multiplicative group modulo m is the direct product of n cyclic groups.at n=9A272590
• Least number with the prime signature of the n-th Catalan number.at n=22A278258
• Numbers k where records occur for d(k^2)/d(k), where d(k) is A000005(k).at n=36A282472
• Numbers k at which the ratio (number of squares in the multiplicative group modulo k)/k reaches a new minimum.at n=21A294342
• Alphabetic length of a divide-and-conquer approach to the regular expression for permutations of n symbols.at n=16A320460
• Semi-unitary highly composite numbers: where the number of semi-unitary divisors of n (A322483) increases to a record.at n=25A322484
• Numbers k where records occur for phi(k+1)/phi(k), where phi is the Euler totient function (A000010).at n=17A335069
• Numbers k where the average number of distinct prime factors of the divisors of k sets a new record.at n=36A346016
• Numbers with a record number of distinct values of the unitary totient function applied to their unitary divisors (A348001).at n=25A348002
• Sum of primorial inflation (A108951) and its Dirichlet inverse.at n=45A354352
• Maximum number of inequivalent permutations of a partition of n, where two permutations are equivalent if they are reversals of each other.at n=38A361223
• Numbers with a record value of number of uniform divisors (A327527).at n=36A368252