A075762 A001003(p-1)/p where p runs through the odd primes.

1, 9, 129, 47169, 1049913, 615504609, 15797864577, 11270258161281, 246696657053411097, 7087786816380876801, 178199489594187990894537, 158945391097530669380671857, 4791412124651983778003371329

Offset: 1

Author

Benoit Cloitre, Oct 09 2002

Keywords

• easy
• nonn

Formula

a(n)=A001003(prime(n+1)-1)/prime(n+1)