For each successive prime p, the largest integer n such that both n and n-1 factor into primes less than or equal to p.
A117581
For each successive prime p, the largest integer n such that both n and n-1 factor into primes less than or equal to p.
Terms
- a(0) =2a(1) =9a(2) =81a(3) =4375a(4) =9801a(5) =123201a(6) =336141a(7) =11859211a(8) =11859211a(9) =177182721a(10) =1611308700a(11) =3463200000a(12) =63927525376a(13) =421138799640
External references
- oeis: A117581