90287

Appears in sequences

• Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1.at n=25A006972
• Composite numbers k that divide Fibonacci(k+1).at n=33A069107
• Numbers k that divide Fibonacci(k+1) but do not divide Fibonacci(k) + 1.at n=29A094412
• Numbers k such that the k-th triangular number contains each of the 10 decimal digits exactly once.at n=31A115939
• Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(2k+1)-1.at n=32A182504
• Lucas-Carmichael numbers with 3 prime factors.at n=18A216925
• Least Lucas-Carmichael number divisible by the n-th prime.at n=28A253597
• 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=39A253598
• Numbers k such that A370681(k) = A370681(k+1).at n=19A370682