67447

Properties

Appears in sequences

• Primes of the form 54k+1 generated recursively. Initial prime is 109. General term is a(n) = Min {p is prime; p divides (R^27 - 1)/(R^9 - 1); p == 1 (mod 27)}, where Q is the product of previous terms in the sequence and R = 3*Q.at n=10A125044
• Number of nX2 1..7 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.at n=5A166829
• Number of nX2 1..7 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in decreasing order.at n=5A166841
• Primes of the form A177353(n) + 1 sorted with respect to increasing n.at n=47A178178
• Denominators of upper primes-only best approximates (POBAs) to Pi; see Comments.at n=25A265811
• Denominators of primes-only best approximates (POBAs) to Pi; see Comments.at n=26A265813
• Smallest Boolean functions from big equivalence classes representing monotone functions (subsequence of A227723).at n=40A349743
• Primes having only {4, 6, 7} as digits.at n=17A385794
• Primes having only {0, 4, 6, 7} as digits.at n=32A386072
• Prime numbersat n=6719