22133

Properties

Appears in sequences

• Numerators of continued fraction convergents to sqrt(134).at n=10A041244
• Numerators of continued fraction convergents to sqrt(536).at n=8A042024
• n*10^7-1, n*10^7-3, n*10^7-7 and n*10^7-9 are all prime.at n=2A064982
• a(n) = (A085249(n) - 1)/6.at n=25A088349
• Primes whose decimal representation is a valid number in base 5 and interpreted as such is again a prime.at n=37A090708
• Primes from merging of 5 successive digits in decimal expansion of exp(2).at n=10A105001
• Father primes of order 8.at n=35A136077
• Numbers such that n^2 = 29 mod 1193.at n=37A165989
• Numerators of the second differences of the sequence of fractions (-1)^(n+1)*A176618(n)/A172031(n).at n=17A195240
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant in [-n,n].at n=18A211069
• Bisection of A195240(n).at n=8A228954
• Least prime p such that p*10^n-1, p*10^n-3, p*10^n-7 and p*10^n-9 are all prime.at n=6A243411
• Least prime whose square contributes to A234429.at n=22A247980
• Primes that can be generated by the concatenation in base 6, in descending order, of two consecutive integers read in base 10.at n=13A287307
• Branch term s_n(b), b > 1 of equivalence classes of prime sequences {s_n(k)} for k > 0 derived by records of first differences of Rowland-like recurrences with increasing even start values >= 4.at n=35A291620
• Number of nX5 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=5A298451
• Number of nX6 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=4A298452
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=49A298454
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=50A298454
• Primes p such that 2*p^2-q^2 and 2*q^2-p^2 are prime, where q is the next prime after p.at n=43A338836