31583

Properties

Appears in sequences

• a(0) = 1, a(n) = 29*n^2 + 2 for n>0.at n=33A010019
• Safe primes (A005385) (p and (p-1)/2 are primes) such that 12*p+1 is also prime.at n=61A075707
• Primes p0 such that p0+p1+p2-+2 are primes; p0,p1,p2 are three consecutive primes.at n=33A158351
• Primes p such that both prevprime(p^2) - 2 and nextprime(p^2) + 2 are also primes.at n=11A226986
• First primes of arithmetic progressions of 7 primes each with the common difference 210.at n=23A227282
• First primes of arithmetic progressions of 8 primes each with the common difference 210.at n=10A227283
• Primes p with A047967(p) also prime.at n=20A236418
• Primes p such that p+2, p+4, p+6, p+8, p+10 are semiprimes.at n=8A241959
• Numbers k such that 2*k + 1 divides 2^(k+1) - 1.at n=22A246648
• Number of n X 2 nonnegative integer arrays with upper left 0 and every value within 3 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=24A252932
• Primes of the form p^4+q^4+r^4-4 with p<=q<=r all prime.at n=8A256380
• Safe primes p such that p + 24 is also a safe prime.at n=24A274381
• a(n) = f(n,n) where f(m,n) = max(m,n) if m < 2 or n < 2; f(m,n) = f(m-1,n-1) + f(m-1,n-2) + f(m-2,n-1) otherwise. Diagonal of A342859.at n=13A342600
• Lexicographically earliest sequence of distinct primes whose partial products lie between noncomposite numbers.at n=41A359940
• Prime numbersat n=3399