[seqfan] Prime a(n) as difference of its neighbours

[Eric Angelini]

Hello SeqFans,
I like this one :
S = 1,2,3,5,8,4,6,7,13,20,9,10,11,21,12,14,15,
16,17,33,18,19,37,56,22,23,45,24,25,26,
27,28,29,57,30,31,61,...

S is the lexico-first permutation of the
integers >0 such that the prime a(n)
= a(n+1)-a(n-1)
Best,
É.