Position of n-th appearance of 2n in the sequence of prime gaps (A001223). If 2n does not appear at least n times, set a(n) = -1.
A356223
Position of n-th appearance of 2n in the sequence of prime gaps (A001223). If 2n does not appear at least n times, set a(n) = -1.
Terms
- a(0) =2a(1) =6a(2) =15a(3) =79a(4) =68a(5) =121a(6) =162a(7) =445a(8) =416a(9) =971a(10) =836a(11) =987a(12) =2888a(13) =1891a(14) =1650a(15) =5637a(16) =5518a(17) =4834a(18) =9237a(19) =8152a(20) =10045a(21) =21550a(22) =20248a(23) =20179a(24) =29914a(25) =36070a(26) =24237a(27) =53355a(28) =52873a(29) =34206
External references
- oeis: A356223