1,1

J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 455, pp 94, Ellipses, Paris 2008.

a(n)=A033993(10^n).

Cf. A033993.

Sequence in context: A067235 A113171 A014362 this_sequence A064261 A105978 A069426

Adjacent sequences: A143039 A143040 A143041 this_sequence A143043 A143044 A143045

more,nonn

Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 18 2008