1,1

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

a(n)=A051270(10^n).

Cf. A051270.

Sequence in context: A068132 A115429 A046395 this_sequence A031821 A064248 A157652

Adjacent sequences: A143040 A143041 A143042 this_sequence A143044 A143045 A143046

more,nonn

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