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

0,1

Links

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

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 *)

Crossrefs

Cf. A050942.

Sequence in context: A329476 A164098 A007936 * A010406 A010451 A080064

Adjacent sequences: A050940 A050941 A050942 * A050944 A050945 A050946

Keyword

nonn

Author

N. J. A. Sloane, Jan 02 2000

Status

approved