A128897 - OEIS

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A128897

((2n)^(2n-1)+1)/(2n+1).

1, 13, 1111, 233017, 90909091, 57154490053, 52914318216943, 67818912035696881, 115047976828352449051, 249660952380952380952381, 674758650917429955329341351, 2222892961417140207415135788073 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n) = ((2n)^(2n-1)+1)/(2n+1). a(n) = A083062(2n-1).`
	CROSSREFS	`Cf. A083062 = (n+1)^n/(n+2)-(-1)^n/(n+2).` `Sequence in context: A185834 A195890 A195520 * A201265 A178560 A091781` `Adjacent sequences: A128894 A128895 A128896 * A128898 A128899 A128900`
	KEYWORD	`nonn`
	AUTHOR	`Alexander Adamchuk (alex(AT)kolmogorov.com), Apr 20 2007`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.