a(1) is 4. a(n) is the least semiprime q (A001358) greater than p = a(n-1), such that p/q is a new minimum.
A277343
a(1) is 4. a(n) is the least semiprime q (A001358) greater than p = a(n-1), such that p/q is a new minimum.
Terms
- a(0) =4a(1) =6a(2) =10a(3) =21a(4) =46a(5) =106a(6) =247a(7) =579a(8) =1363a(9) =3214a(10) =7586a(11) =17915a(12) =42311a(13) =99931a(14) =236023a(15) =557455a(16) =1316638a(17) =3109733a(18) =7344803a(19) =17347513a(20) =40972678a(21) =96772393a(22) =228564417a(23) =539840885a(24) =1275037411a(25) =3011480697a(26) =7112745019a(27) =16799424206a(28) =39678162637a(29) =93714913738
External references
- oeis: A277343