81181

Properties

Appears in sequences

• Number of series-reduced trees with n nodes.at n=25A000014
• Primes that contain digits 1 and 8 only.at n=8A020456
• Gaps of 10 in sequence A038593 (lower terms).at n=28A038659
• Primes having only {0, 1, 8} as digits.at n=19A061247
• Smallest prime beginning and ending in 2n+1 or 0 if no such prime exists.at n=40A071234
• Primes in which the digit string can be partitioned into three parts such that third (least significant) part is the product of the first two.at n=32A088294
• Primes such that swapping some pair of digits gives a square.at n=40A171585
• Primes formed by concatenating palindromes having even number of digits with 1.at n=26A210534
• Primes having only {1, 4, 8} as digits.at n=20A260270
• Primes that are the concatenation of a square and a prime that is the concatenation of two squares.at n=37A364359
• Primes having only {1, 2, 8} as digits.at n=33A385775
• Primes having only {1, 5, 8} as digits.at n=29A385780
• Primes having only {1, 6, 8} as digits.at n=28A385782
• Primes having only {1, 8, 9} as digits.at n=38A385783
• Primes that are the concatenation of x, 1 and x for some x.at n=12A392227
• Prime numbersat n=7946