1,2

A051237 and A187869 are the sequence that result if in addition we require that the number begins with "1" and ends with "n".

Table of n, a(n) for n=1..10.

Claudio Meller, Lineas con numeros de 1 a n.

Cf. A051237, A187869.

Sequence in context: A132943 A262576 A262575 * A187869 A262574 A159901

Adjacent sequences: A187868 A187869 A187870 * A187872 A187873 A187874

nonn,base,more

N. J. A. Sloane, Mar 14 2011

a(6) to a(10) from Claudio Meller, Mar 14 2011

a(10) corrected by Nathaniel Johnston, Mar 15 2011

approved