126001

Properties

Appears in sequences

• Numerators of continued fraction convergents to sqrt(70).at n=11A041122
• Numerators of continued fraction convergents to sqrt(280).at n=11A041526
• Numerators of continued fraction convergents to sqrt(630).at n=3A042208
• Primes with 22 as smallest positive primitive root.at n=31A061334
• Unimodal analog of Fibonacci numbers: a(n+1) = Sum_{k=0..floor(n/2)} A071922(n-k,k).at n=20A072176
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=4, I={0,2}.at n=40A079974
• Primes of the form 2*p^2 - 1, where p is prime.at n=20A092057
• Initial terms of chains consisting of four consecutive integers, for none of which is the value of sigma-function divisible by six.at n=11A097020
• a(n)=the sum of the (1,2)- and (1,3)-entries and twice the (1,4)-entry of the matrix P^n + T^n, where the 4 X 4 matrices P and T are defined by P=[0,1,0,0;0,0,1,0;0,0,0,1;1,0,0,0] and T=[0,1,0,0;0,0,1,0;0,0,0,1;1,0,0,1].at n=38A109526
• Smallest primes starting a complete three iterations Cunningham chain of the second kind.at n=24A110024
• Erroneous version of A046972.at n=5A144727
• Primes in A005891 = Centered pentagonal numbers: (5n^2 + 5n + 2)/2.at n=35A145838
• a(n) = 1250*n^2 + 100*n + 1.at n=9A154375
• Primes of the form 648*k^2 - 72*k + 1.at n=5A154511
• a(n) = 648*n^2 - 72*n + 1.at n=13A154514
• Primes of the form 1000*k + 1.at n=31A156655
• a(n) = 5000*n^2 + 200*n + 1.at n=4A157511
• x-values in the solution to x^2-70*y^2=1.at n=2A176377
• Primes of the form 2*p^k-1, where p is prime and k > 1.at n=31A178491
• Primes of the form 2520k + 1 for some k.at n=17A217588