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Ordinary Numbers (Posted on 2023-06-09) Difficulty: 2 of 5
What is the next number in this sequence?:

1, 2, 3, 5, 11, 31,...

  Submitted by Charlie    
Rating: 5.0000 (1 votes)
Solution: (Hide)
a(1) = 1; a(n+1) = a(n)-th prime.

The next number is the 31st prime: 127.

OEIS:
A007097 Primeth recurrence: a(n+1) = a(n)-th prime. (Formerly M0734)

1, 2, 3, 5, 11, 31, 127, 709, 5381, 52711, 648391, 9737333, 174440041, 3657500101, 88362852307, 2428095424619, 75063692618249, 2586559730396077, 98552043847093519, 4123221751654370051, 188272405179937051081, 9332039515881088707361, 499720579610303128776791, 28785866289100396890228041

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Hints/Tipsre: Puzzle Thoughts Ady TZIDON2023-06-28 17:05:39
Puzzle Thoughts K Sengupta2023-06-17 00:04:00
SolutionAnswerMath Man2023-06-10 18:02:46
Hints/TipshintCharlie2023-06-10 14:26:49
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