91249

Properties

Appears in sequences

• a(1) = 2; for n > 1, a(n) is the smallest prime > a(n-1) such that each successive digit in the concatenation of terms (that does not follow 9) is greater than the previous digit.at n=29A068827
• Emirps starting and ending with composite digit 9.at n=21A128374
• Canyon primes (A134971) whose first and last digits are 9.at n=35A179673
• Primes that can be generated by the concatenation in base 9, in descending order, of two consecutive integers read in base 10.at n=32A287313
• Number of free polyominoes with n cells having simply-connected interiors such that no smaller polyomino has the same bracelet.at n=15A342538
• Prime numbersat n=8825