3-smooth numbers k such that k+1 and (k+2)/2 are prime.
A325255
3-smooth numbers k such that k+1 and (k+2)/2 are prime.
Terms
- a(0) =2a(1) =4a(2) =12a(3) =36a(4) =72a(5) =192a(6) =1152a(7) =2592a(8) =2916a(9) =1492992a(10) =1990656a(11) =5308416a(12) =28311552a(13) =6879707136
External references
- oeis: A325255