A050943 The sum of 2 or more consecutive nonzero triangular numbers.

4, 9, 10, 16, 19, 20, 25, 31, 34, 35, 36, 46, 49, 52, 55, 56, 64, 74, 80, 81, 83, 84, 85, 100, 109, 110, 116, 119, 120, 121, 130, 136, 144, 145, 155, 161, 164, 165, 166, 169, 185, 196, 199, 200, 202, 210, 216, 219, 220, 225, 230, 235, 244, 251

Offset: 0

Author

N. J. A. Sloane, Jan 02 2000

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..7350 (missing terms inserted by _Sean A. Irvine_, Apr 28 2022)

Crossrefs

Cf. A050942.

Programs

Mathematica

nn=20;With[{trnos=Accumulate[Range[nn]]},Union[Flatten[Table[ Total/@ Partition[ trnos,n,1],{n,2,nn}]]]] (* Harvey P. Dale, Jul 25 2014 *)