A077400 - OEIS

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A077400

Triangular numbers that are 7 times triangular numbers.

0, 21, 105, 5460, 26796, 1386945, 6806205, 352278696, 1728749400, 89477401965, 439095541521, 22726907820540, 111528538797060 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Scott A. Brown, Brown's Math Page, etc.`
	FORMULA	`Let b(n)=A077399 then a(n)=7*b(n).`
	CROSSREFS	`Cf. A077398, A077399, A077401.` `Sequence in context: A060537 A116689 A068986 * A041854 A071333 A039611` `Adjacent sequences: A077397 A077398 A077399 * A077401 A077402 A077403`
	KEYWORD	`easy,nonn`
	AUTHOR	`Bruce Corrigan (scentman(AT)myfamily.com), Nov 05 2002`

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Last modified February 16 06:27 EST 2012. Contains 205860 sequences.