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 A338396 The prime numbers in A158923. 1

%I

%S 2,3,5,7,11,13,19,31,109,139,149,179,199,229,239,683,739,809,823,907,

%T 977,991,1019,1033,1061,1103,1117,1187,1201,1229,1327,1439,1453,1481,

%U 1523,1579,1607,1621,1663,1733,1747,1789,4931,4967,5003,5021,5039,5147,5237

%N The prime numbers in A158923.

%C This sequence is consists of the prime numbers in A158923, in which A158923(m) is the sum of the previous term A158923(m-1) and the average prime gap log(A158923(m-1)) rounded to the nearest integer with A158923(1) = 2.

%o (Python)

%o from sympy import isprime

%o from math import log

%o print(2)

%o a_last = p_last = m = 2

%o n = 1

%o while m >= 2:

%o a = a_last + int(log(a_last) + 0.5)

%o if isprime(a) == 1:

%o print(a)

%o n += 1

%o a_last = a

%o m += 1

%Y Cf. A000040, A158923.

%K nonn

%O 1,1

%A _Ya-Ping Lu_, Oct 23 2020

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Last modified June 22 01:06 EDT 2021. Contains 345367 sequences. (Running on oeis4.)