A114023 - OEIS

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A114023

Squares of the form semiprime(n) + n-th triangular number.

4, 16, 100, 144 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n) = semiprime(n) + n(n+1)/2.`
	CROSSREFS	`Cf. A000217, A111440, A112662.` `Sequence in context: A130683 A091040 A029985 * A145823 A121142 A087296` `Adjacent sequences: A114020 A114021 A114022 * A114024 A114025 A114026`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Feb 01 2006`

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Last modified February 16 11:23 EST 2012. Contains 205907 sequences.