[seqfan] A light variation
Eric Angelini
Eric.Angelini at kntv.be
Wed Jan 20 10:57:24 CET 2016
Hello SeqFans,
here is https://oeis.org/A055265 :
> a(n) is the smallest positive integer not already in the sequence
> such that a(n)+a(n-1) is prime, starting with a(1)=1.
I propose this variant:
E> a(n) is the smallest positive integer not already in the sequence
E> such that a(n)+[the last digit of a(n-1)] is prime, starting with a(1)=1.
I guess E starts like this (and is a permutation of the integers >0):
E = 1,2,3,4,7,6,5,8,9,10,11,12,15,14,13,16,17,22,21,18,23,20,...
Best,
É.
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