87421

Properties

Appears in sequences

• Numbers k such that (37^k - 1)/36 is prime.at n=9A128003
• Primes p such that 2*p^4-+15 are also prime.at n=35A174366
• Reverse concatenation of distinct digits of all divisors of n in base 10.at n=27A256824
• Centered 20-gonal (or icosagonal) primes.at n=22A264845
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood.at n=16A279501
• Primes p such that p+12, (p+1)/2, and (p+13)/2 are also prime.at n=26A283869
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 805", based on the 5-celled von Neumann neighborhood.at n=16A284140
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 998", based on the 5-celled von Neumann neighborhood.at n=16A284546
• Expansion of g^2/(1 + x*g), where g = 1+x*g^3 is the g.f. of A001764.at n=8A391294
• Prime numbersat n=8486