28807

Properties

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 100 ones.at n=26A031868
• Base-8 palindromes that start with 7.at n=20A043027
• Prime number spiral (clockwise, Southeast spoke).at n=28A054564
• Palindromic primes in bases 2 and 8.at n=4A056145
• Molien series for action of SL(3,C) on ternary forms of degree 4.at n=34A083024
• Numerator and denominator sums of convergents to the Thue-Morse constant, 0.412454033...at n=10A085396
• Larger of two consecutive primes whose sum is a square.at n=18A118591
• Primes p such that p+1, p+2 and p+3 have equal number of divisors.at n=31A119711
• Numbers k such that (18^k - 1)/17 is prime.at n=2A133857
• Primes of the form 2n^2 + 7.at n=13A201475
• Primes of the form 8*k^2 + 7.at n=7A201704
• Primes of the form 3*m^2 - 5.at n=17A201717
• Lesser of Gridgeman pairs in base 8 in increasing order: pairs of primes palindromic in base 8 which differ only in their middle digits by a difference of 1.at n=6A246871
• Prime numbers with more than one 1 < k < 10 for which the base-k representation is palindromic.at n=30A255161
• Primes of the form 6*p + 1 with p prime that are also of the form x^2 + 27*y^2 and congruent to 7 mod 24.at n=32A256172
• Palindromic numbers in bases 2 and 8 written in base 10.at n=58A259380
• Numbers k such that (26*10^k - 119)/3 is prime.at n=25A274238
• Primes in A114381.at n=30A345099
• Primes p such that the sum of cubes of the 4 consecutive primes starting with p is twice a prime.at n=35A368637
• Primes having only {0, 2, 7, 8} as digits.at n=42A386053