60309

Appears in sequences

• Numbers n such that 7^n - 6^(n+1) is prime.at n=19A273937
• Numbers such that the decimal digits of sigma(n) are a permutation of those of sigma(n)-n.at n=21A277114
• Expansion of Sum_{k>=2} x^Fibonacci(k)/(1 - x^Fibonacci(k)) / Product_{k>=2} (1 - x^Fibonacci(k)).at n=47A281689
• Composite numbers for which A324644(n)/A324198(n) = 2 and sigma(n) == 2 (mod 4).at n=47A371082
• Number of tree interval posets of permutations of size n, considered up to isomorphism.at n=14A373456