1,3

Table of n, a(n) for n=1..66.

5 is in the sequence because 5 can be written as 3^2-2^2

Cf. A051213.

Sequence in context: A160519 A241480 A211656 * A278181 A232566 A192649

Adjacent sequences: A051201 A051202 A051203 * A051205 A051206 A051207

nonn

David W. Wilson

Corrected by Henry Bottomley, Jul 24 2000

approved