1,1

a(n) = 676n^2 + n for n < 55, but a(55) = 1974078. - Charles R Greathouse IV, Aug 04 2017

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Sequence in context: A159893 A142755 A158386 * A205749 A108824 A205471

Adjacent sequences: A031727 A031728 A031729 * A031731 A031732 A031733

nonn

David W. Wilson

approved