1,3
If the Goldbach conjecture is false then a(n)=a(n+1) for some n.
C. Clawson, Mathematical mysteries, Plenum Press 1996, p. 241.
Index entries for sequences related to Goldbach conjecture
Cf. A002375, A045922.
Sequence in context: A080276 A120836 A011864 * A006856 A140199 A072190
Adjacent sequences: A045916 A045917 A045918 * A045920 A045921 A045922
easy,nonn
Felice Russo (frusso(AT)micron.com)