20780

Appears in sequences

• Denominators of continued fraction convergents to sqrt(751).at n=10A042447
• Numbers n such that 179*2^n-1 is prime.at n=3A050841
• Increasing partial quotients in the continued fraction expansion of the prime constant (A051006).at n=13A102878
• Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.at n=5A316298
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero.at n=5A316302
• a(n) = [x^(n^2)] Product_{k=1..n} theta_3(q^k), where theta_3() is the Jacobi theta function.at n=8A321179
• Number of ways to write n as an ordered sum of 5 squarefree numbers.at n=39A341065
• G.f. A(x) satisfies A(x)^3 = A( x^3 + 3*x*A(x)^3 + 3*A(x)^5 ).at n=8A378263
• G.f.: Sum_{k>=0} x^k * Product_{j=1..5*k} (1 + x^j).at n=51A385069