27330

Appears in sequences

• a(1) = 3; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=42A025004
• Numbers k such that Sum_{j=1..k-1} (2*j)!/4^j is an integer.at n=8A216042
• Least positive integer k such that prime(k)-k, prime(k)+k, prime(k*n)-k*n, prime(k*n)+k*n, prime(k)+k*n and prime(k*n)+k are all prime.at n=3A259492
• Number of nX2 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.at n=9A303684
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.at n=56A303690
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.at n=56A304065
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.at n=56A304156
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=56A305022
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.at n=56A305175
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=56A305457
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.at n=56A305509
• T(n,k) = Number of n X k 0..1 arrays with every element unequal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=56A316686
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=56A316763