104663

Appears in sequences

• Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1.at n=26A006972
• Least k such that 1/tau(k) + 1/tau(k+1) + 1/tau(k+2) + ... + 1/tau(k+n) is equal to 1 (where tau(k)=A000005(k) is the number of divisors of k).at n=10A073545
• Odd numbers k that divide Lucas(k) + 1.at n=29A094399
• Numbers k that divide both Fibonacci(k+1) and Lucas(k) + 1.at n=21A094402
• Odd numbers k that divide Fibonacci(k) - 1 but not Fibonacci(k-1).at n=23A094409
• Numbers k that divide Fibonacci(k+1) but do not divide Fibonacci(k) + 1.at n=31A094412
• Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(2k+1)-1.at n=35A182504
• Difference between the number of odd parts and the number of even parts in all the partitions of n.at n=38A209423
• Lucas-Carmichael numbers with 3 prime factors.at n=19A216925
• Least Lucas-Carmichael number divisible by the n-th prime.at n=23A253597
• a(n) = least Lucas-Carmichael number which is divisible by b(n), where {b(n)} (A255602) is the list of all numbers which could be a divisor of a Lucas-Carmichael number.at n=33A253598