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A068591
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Nonessential triangular numbers (conjectured).
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0
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8, 11, 16, 17, 23, 24, 29, 31, 36, 38, 41, 43, 45, 49, 50, 59, 60, 61, 62, 65
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Whether these numbers are actually nonessential is not proved. I merely have numerical evidence at this point.
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LINKS
| Ed Pegg Jr, Triangular sums
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EXAMPLE
| Any number is the sum of three triangular numbers (Gauss). The 8th triangular number (36) seems nonessential for these sums. After eliminating 8, the eleventh triangular number seems to be nonessential.
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CROSSREFS
| Sequence in context: A032423 A063724 A154685 * A065348 A155717 A188197
Adjacent sequences: A068588 A068589 A068590 * A068592 A068593 A068594
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KEYWORD
| more,nonn
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AUTHOR
| Ed Pegg Jr (ed(AT)mathpuzzle.com), Mar 30 2002
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