76561

Properties

Appears in sequences

• List of sets of four consecutive primes in arithmetic progression with common difference 18.at n=5A033450
• Primes p such that p, p+18, p+36 are consecutive primes.at n=15A052189
• Balanced primes separated from the next lower and next higher prime neighbors by 18.at n=14A053073
• Second term of balanced prime quartets: p(m)-p(m-1) = p(m+1)-p(m) = p(m+2)-p(m+1).at n=26A054801
• Primes arising in A084726.at n=4A084727
• Primes of the form x^2 + 18480*y^2.at n=18A173274
• Larger of emirp pairs that are merely reversals of their end digits.at n=45A263242
• Centered 20-gonal (or icosagonal) primes.at n=20A264845
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=49A287030
• Primes of the form k!7+1, where k!7 is the septuple factorial number (A114799).at n=11A288717
• Numbers k such that k*(k+1) divides tribonacci(k) (A000073(k)).at n=15A299156
• Prime numbersat n=7532