43733

Appears in sequences

• Numbers n such that 145*2^n-1 is prime.at n=13A050598
• Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 11.at n=26A051976
• Numbers n such that C(4n,n)/(3n+1) (A002293) is not divisible by 4.at n=40A078971
• Triangle of sums of Jacobsthal numbers related to binomial(4n,n)/(3n+1) mod 4.at n=31A113049
• Number of binary words of length n containing at least one subword 10^{6}1 and no subwords 10^{i}1 with i<6.at n=47A143286
• a(n) = 52*n^2 + 1.at n=29A158644
• Number of triples (w,x,y) with all terms in {0,...,n} and w >= floor((x+y)/3).at n=39A212972
• Numbers k such that 3^k - 32 is prime.at n=20A219049
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.at n=37A221483
• Number of 2 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.at n=7A221484
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=3} (n-|i|)*(n-|j|)/4.at n=39A331775