415799

Properties

Appears in sequences

• a(n) = A104350(n) - 1.at n=10A104357
• Smallest prime factor of A104357(n) = A104350(n) - 1.at n=9A104358
• Greatest prime factor of A104357(n) = A104350(n) - 1.at n=9A104359
• Primes of the form A104350(k) - 1.at n=7A104364
• Numbers k where records occur for d(k+1)/d(k), where d(k) is A000005(k).at n=27A282531
• Lesser of twin primes p >= 3 for which sigma(p+1)/sigma(p-1) reaches record value, where sigma(n) is the divisor sum function (A000203).at n=5A326391
• Lesser of twin primes p for which sigma(p+1)/sigma(p) reaches record value, where sigma(n) is the divisor sum function (A000203).at n=17A326392
• Lesser of twin primes p such that d(p+1) > d(q+1) for all lessers of twin primes q < p, where d(n) is the number of divisors of n (A000005).at n=23A328329
• Numbers k achieving record deficiency via a residue-based measure, M(k) = (k+1)*(1 - zeta(2)/2) - 1 - ( Sum_{j=1..k} k mod j )/k.at n=21A362082
• Prime numbersat n=35064