36241

Properties

Appears in sequences

• a(n) = a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(2) = 4.at n=37A050039
• Primes with 19 as smallest positive primitive root.at n=29A061331
• a(n) is the n-th prime whose decimal expansion begins with the decimal expansion of n.at n=35A077345
• Primes that are the sum of all composite numbers in-between prime numbers p(n) and p(n+2).at n=20A174521
• a(n) = Sum_{i=0..n} digsum_6(i)^4, where digsum_6(i) = A053827(i).at n=32A231675
• Numbers k such that (493*10^k - 7)/9 is prime.at n=24A275410
• Number of 2Xn 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=12A281470
• Terms k of A112998 such that k+2 is nonsquarefree.at n=24A328160
• Prime numbersat n=3846