28164213

Appears in sequences

• Denominator of 1/3 + 1/7 + 1/11 + ... + 1/(4n-1).at n=8A074638
• a(n) is the least number with n factorizations into S-primes (numbers 4k+1 with no proper divisors > 1 of form 4m+1).at n=24A321337
• Where the number of divisors d(k) reaches a new record for numbers k whose prime factors are of the form 4*j+3.at n=22A326313