63029

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 21.at n=22A031609
• Twin primes belonging to packs of four or more twin pairs.at n=14A068220
• a(n) is the minimal prime of the form 4k+1 for which s=A008784(n) is the minimal positive integer such that s*a(n)-floor(sqrt(s*a(n)))^2 is a square.at n=19A145215
• Let m = A002445(n); then a(n) = largest member of A001359 (the lesser twin primes sequence) <= m.at n=17A156053
• Base-6 pandigital primes: primes having at least one of each digit 0,1,2,3,4,5 when written in base 6.at n=32A175278
• Prime p such that p and p+2 are twin primes and p^2+p-1 p^2+p+1 are also twin primes.at n=18A228968
• Prime numbersat n=6321