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Name the sequence (Posted on 2018-09-17) Difficulty: 2 of 5
Let the increasing sequence of integers D: d1, d2, d3, ...dn-1, dn... represent the sequence of consecutive differences of another sequence T: t1, t2, t3,, tn.

Given t1=0 , and tk-tk-1=dk-1=k, provide definition and formula for the sequence T.

No Solution Yet Submitted by Ady TZIDON    
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re(2): Sequence Name Comment 5 of 5 |
(In reply to re: Sequence Name by Charlie)

yes - that was my solution, still based on the Triangular numbers. Had the problem been set up a little differently, starting with index zero or else:

it would have been exactly the Triangle Numbers. 

  Posted by Steven Lord on 2018-09-17 23:57:49
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