478801

Properties

Appears in sequences

• E.g.f: 1/(1 - sin(x) + sin(x)^2 - sin(x)^3).at n=9A002980
• First member of a prime 5-tuple in a 2p-1 progression.at n=27A057328
• First member of a prime sextuplet in a 2p-1 progression.at n=6A057329
• Primes of the form (prime(k-1)+1)*(prime(k+1)-1) + 1, k>1.at n=21A087106
• Centered 19-gonal (or nonadecagonal) primes.at n=32A264844
• a(n) is the least prime p such that there are exactly n primes of the form p+d where d is a divisor of p-1 or of p+1.at n=39A340160
• Prime numbersat n=39914