Let k = A064771(n) be the n-th pseudoperfect number such that {d(i)} is a unique subset of its proper divisors that sums to k, a(n) is the least number m such that k*d(i)*m + 1 is prime for all d(i) in this subset so their product is a Carmichael number.
A319011
Let k = A064771(n) be the n-th pseudoperfect number such that {d(i)} is a unique subset of its proper divisors that sums to k, a(n) is the least number m such that k*d(i)*m + 1 is prime for all d(i) in this subset so their product is a Carmichael number.
Terms
- a(0) =1a(1) =333a(2) =2136a(3) =14a(4) =72765a(5) =49a(6) =9765a(7) =5a(8) =154a(9) =490a(10) =276a(11) =55a(12) =86a(13) =104a(14) =228195a(15) =5a(16) =25597845a(17) =264a(18) =220a(19) =181a(20) =24403740a(21) =70a(22) =226a(23) =234a(24) =199250835a(25) =215a(26) =358293a(27) =13494274080a(28) =49a(29) =70
External references
- oeis: A319011