A099150 - OEIS

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A099150

Positive integers a such that f(a)+f(a)=concatenation of a and a, where f(k)=k(k+3)/2 (A000096).

8, 98, 998, 9998, 99998, 999998, 9999998, 99999998 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	CROSSREFS	`Cf. A096032, A099148, A099149.` `Sequence in context: A196327 A116130 A116287 * A116229 A199029 A159232` `Adjacent sequences: A099147 A099148 A099149 * A099151 A099152 A099153`
	KEYWORD	`nonn,base`
	AUTHOR	`John W Layman (layman(AT)math.vt.edu), Sep 30 2004`

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Last modified February 15 12:25 EST 2012. Contains 205786 sequences.