808991

Properties

Appears in sequences

• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 3, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1.at n=20A049942
• Smaller member of a twin prime pair with a square sum.at n=28A069496
• a(n) = 4802*n^2 - 196*n + 1.at n=12A157364
• Primes whose reversal + 1 is a square.at n=31A167217
• Smaller member of a twin prime pair with a perfect power sum.at n=31A270231
• Prime numbersat n=64604