40241

Properties

Appears in sequences

• Primes p such that googol - p is prime.at n=30A108252
• a(n) = 8 + floor( (1 + Sum_{j=1..n-1} a(j)) / 2).at n=21A120137
• Number of dominating subsets of the graph G(n) obtained by joining each vertex of the path graph P_{n+1} on n+1 vertices with an additional vertex (the join of K_1 and P_{n+1}).at n=13A213663
• Primes of form n^2 + 14641.at n=17A256839
• Limiting reverse row of the array A274190.at n=26A274199
• Numbers k such that (185*10^k + 7)/3 is prime.at n=22A281911
• Prime numbers p such that the sum of the prime numbers up to its square root equals primepi(p).at n=9A329403
• Numbers k such that 2*k+(A187129(k) mod A185297(k)) is prime.at n=36A343770
• First of three consecutive primes p,q,r such that p+q, p+r and q+r are all triprimes.at n=15A362203
• Prime numbersat n=4227