a(n) is the least semiprime such that a(n) - n and a(n) + n are the previous and the next semiprimes.
A365222
a(n) is the least semiprime such that a(n) - n and a(n) + n are the previous and the next semiprimes.
Terms
- a(0) =34a(1) =185a(2) =262a(3) =407a(4) =314a(5) =371a(6) =194a(7) =2271a(8) =6218a(9) =4237a(10) =109898a(11) =110645a(12) =53602a(13) =169773a(14) =112298a(15) =163985a(16) =284738a(17) =48529a(18) =1033378a(19) =1781833a(20) =570502a(21) =1963091a(22) =12527458a(23) =6051613a(24) =30377422a(25) =19549343a(26) =66761746a(27) =7926901a(28) =363311378a(29) =5861227
External references
- oeis: A365222