id:A124171 - OEIS Search Results

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Sequence obtained by reading the triangles shown below by rows.

+0
3

1, 1, 2, 3, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 1, 2, 3 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`1` `1` `2 3` `1` `2 3` `4 5 6` `1` `2 3` `4 5 6` `7 8 9 10` `1` `2 3` `4 5 6` `7 8 9 10` `11 12 13 14 15`
	MAPLE	`A000217 := proc(n) n*(n+1)/2 ; end : for t from 1 to 10 do for i from 1 to A000217(t) do printf("%d, ", i) ; od ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 18 2007`
	CROSSREFS	`See A115215 for another version.` `Sequence in context: A003315 A071797 A025481 this_sequence A076645 A011448 A067280` `Adjacent sequences: A124168 A124169 A124170 this_sequence A124172 A124173 A124174`
	KEYWORD	`nonn,tabf,easy`
	AUTHOR	`Colm Mulcahy (colm(AT)spelman.edu), Dec 05 2006`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 18 2007`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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