42793

Properties

Appears in sequences

• Decimal part of a(n)^(1/4) starts with a 'nine digits' anagram.at n=13A034279
• The Riemann primes of the psi type and index 1.at n=41A197185
• Primes of the form p(k)^2 + q(m)^2 with k > 0 and m > 0, where p(.) is the partition function (A000041), and q(.) is the strict partition function (A000009).at n=59A233346
• Number of surviving (but not bifurcating) odd nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).at n=41A293519
• Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=6A318041
• Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=3A318044
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=48A318045
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=51A318045
• Primes p such that p^2 + 1 has more divisors than p^2 - 1.at n=31A358879
• Position of first zero in the n-th differences of the squarefree numbers (A005117), or 0 if it does not appear.at n=22A377042
• Prime numbersat n=4475