239231

Properties

Appears in sequences

• a(n) is the number of compositions of n in which the maximum part size is 5.at n=21A006979
• Primes p such that 1p1, 3p3, 7p7 and 9p9 are all primes.at n=30A059694
• Initial primes of 5 consecutive primes with consecutive gaps 2, 4, 6, 8.at n=26A190814
• Prime numbers p such that x^2 + x + p produces primes for x = 0..4 but not x = 5.at n=30A210363
• Least m such that the Collatz (3x+1) iteration of m has exactly n increasing peak values.at n=28A221470
• Prime numbersat n=21157