38807
domain: N
Appears in sequences
- Number of Goldbach partitions of 10^n.at n=6A065577
- Numbers m such that m and m+2 are both brilliant numbers, where brilliant numbers are semiprimes whose prime factors have an equal number of decimal digits, or whose prime factors are equal.at n=19A083284
- 2*JacobiSymbol(p,5) mod p^2 for p=prime(n).at n=44A113651
- Triangle read by rows: T(n,k) = 2*A001263(n,k) - 1.at n=60A132787
- Subset of A037165 (p(n)*p(n+1)-p(n)-p(n+1)) for twin primes.at n=14A137367
- a(n) = 22*n^2 - 1.at n=41A158540
- Numbers k such that 128 * 3^k + 1 is prime.at n=25A388408