1,1

(50*m)^2 + m for m >= 1 are terms of this sequence (see comment in A031712). The term 26020302 is not of this form. - Chai Wah Wu, Jun 19 2016

Chai Wah Wu, Table of n, a(n) for n = 1..10000

Sequence in context: A235439 A235404 A120408 * A031688 A031548 A045216

Adjacent sequences: A031775 A031776 A031777 * A031779 A031780 A031781

nonn,changed

David W. Wilson

approved