[seqfan] Symmetrically: a(a(n))=a(n)+a(n+1)

[Eric Angelini]

Hello Seqfans (bis)
another 'self-describing' seq asking if it is
worth entering the OEIS:
S = 3,4,7,11,8,9,18,17,27,12,19,31,15,21,36,20,44,...
Again, "always use the smallest available
integer not leading to a contradiction"

This is an horror to calculate by hand,
but si fun -- have a try !
...

Best,
E.

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