1,2
a(n) is > the n-th triangular number. Conjecture: There are no composite members.
Cf. A081516, A081517.
Sequence in context: A023249 A090513 A191050 * A184856 A023234 A134707
Adjacent sequences: A081512 A081513 A081514 * A081516 A081517 A081518
nonn,more
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 27 2003
a(7)-a(9) from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 23 2007