id:A115887 - OEIS Search Results

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Triangular numbers equal to the difference between a prime number and its index.

+0
2

1, 3, 6, 10, 28, 105, 120, 153, 231, 465, 496, 1081, 1378, 1485, 1653, 1711, 2628, 3003, 3081, 3160, 4950, 5050, 5460, 6670, 6903, 8001, 8778, 10296, 11781, 14028, 15225, 16290, 19701, 20503, 21528, 21945, 22155, 24310, 24531, 25200, 27495 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`28=T(7)=p(13)-13.`
	CROSSREFS	`Cf. A115883.` `Sequence in context: A116544 A068866 A110891 this_sequence A068195 A080506 A109163` `Adjacent sequences: A115884 A115885 A115886 this_sequence A115888 A115889 A115890`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research