199403

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 2x + 7.at n=18A023305
• 7th iteration of the hyperbinomial transform on the sequence of 1's.at n=5A218499
• Denominators of upper primes-only best approximates (POBAs) to Pi; see Comments.at n=26A265811
• Denominators of primes-only best approximates (POBAs) to Pi; see Comments.at n=27A265813
• Triangle read by rows: T(n,k) is the number of n-digit numbers having a k-digit greatest prime factor.at n=19A294952
• Prime numbersat n=17934