81017

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 29.at n=10A031617
• Primes of the form 1+2*n+3*n^2.at n=22A122430
• Primes of the form x^2 + 29*(x+1)^2.at n=13A176695
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.at n=9A259994
• Primes that yield a prime when any single digit is replaced by its 10's complement.at n=44A345529
• Primes p such that p+2, (p^2-1)/2+p and (p^2+3)/2+3*p are also prime.at n=23A352948
• Binary palindromic numbers whose digit sum and aliquot sum are also binary palindromic.at n=17A363965
• Lowest prime p in a ladder of 4 consecutive primes p, p+2, p+6, p+14.at n=28A372247
• Prime numbersat n=7928