33001

Appears in sequences

• Squares written in base 4.at n=31A001739
• Apery (Apéry) numbers: Sum_{k=0..n} (binomial(n,k)*binomial(n+k,k))^2.at n=4A005259
• Strong pseudoprimes to base 17.at n=19A020243
• Strong pseudoprimes to base 29.at n=20A020255
• Strong pseudoprimes to base 44.at n=25A020270
• Strong pseudoprimes to base 89.at n=21A020315
• a(n) = p - A072181(n), where p is the least prime > A072181(n) + 1.at n=46A082432
• Square array, read by antidiagonals, where row n equals the crystal ball sequence for the 2*n-dimensional lattice A_n x A_n.at n=40A143007
• Crystal ball sequence for the A4 x A4 lattice.at n=4A143010
• Denominators of the continued fraction convergents of log_10(11).at n=10A215756
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 4 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=4 and b=-1, respectively.at n=38A337627
• Odd composite integers m such that A000032(3*m-J(m,5)) == 3*J(m,5) (mod m), where J(m,5) is the Jacobi symbol.at n=34A339724
• Odd composite integers m such that A000045(3*m-J(m,5)) == 1 (mod m), where J(m,5) is the Jacobi symbol.at n=37A340235
• Square array read by ascending antidiagonals: T(n,k) = [x^k] 1/(1 - x) * Legendre_P(k, (1 + x)/(1 - x))^n for n, k >= 0.at n=25A364113