55373

Properties

Appears in sequences

• Primes with only prime digits and whose initial, all intermediate and final iterated sums of digits are primes.at n=22A070029
• Let a(1)=1; for n>1, a(n)=nextprime((Pi/2)*a(n-1)).at n=21A084572
• Number of n X 5 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=8A224035
• Lesser of super amicable pair m < n defined by sigma(sigma(m)) = sigma(sigma(n)) = m + n.at n=3A324255
• a(1) is the smallest prime p such that 6*p^2-1 and 6*p^2+1 are twin primes; for n > 1, a(n) is the smallest prime q > a(n-1) such that 6*q^prime(n)-1 and 6*q^prime(n)+1 are twin primes or 0 if no solution exists.at n=5A327581
• a(n) is the least prime p such that the next prime after p with the same last digit as p is p+10*n.at n=22A328550
• Maximal sequence of primes whose digits are primes and whose digit sum is also a term.at n=17A360497
• Prime numbersat n=5624