102481

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 71.at n=1A031659
• Primes that can be formed by concatenating 2^a and 3^b.at n=37A068801
• Primes of the form 16*m^2 + 81, m=1,2,3,...at n=15A087861
• Triangle T(n,k), n>=3, 3<=k<=n, read by rows: T(n,k) = number of simple graphs on n labeled nodes, where each maximally connected subgraph consists of a single node or has a unique cycle of length k.at n=18A144212
• Primes of the form x^2 + 18480*y^2.at n=31A173274
• Primes of the form 7n^2 - 6.at n=12A201852
• Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=4A255155
• Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=3A255156
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=31A255159
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=32A255159
• Primes of the form n^2 + 81.at n=30A256775
• Prime numbersat n=9812