A137643 - OEIS

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A137643

((2n)^((2n+1)^2) + 1)/(2n+1)^3.

1, 19, 9007199254741, 392750863685502459010271914701912679, 19389268200585836264288587113776883575610248525384021488302948711030121, 7513148009015777610818933132982719759579263711495116453794139744552967693463561232156273478587528174305033809166040571 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n) = ((2n)^((2n+1)^2) + 1)/(2n+1)^3`
	MATHEMATICA	`Table[ ((2n)^((2n+1)^2) + 1)/(2n+1)^3, {n, 0, 10} ]`
	CROSSREFS	`Cf. A137641 = ((n - 1)^(n^2) + 1)/n^3. Cf. A137642 = ((p + 1)^(p^2) - 1)/p^3 for p = prime[n]. Cf. A133591 = ((p - 1)^(p^2) + 1)/p^3 for p = prime[n].` `Sequence in context: A013890 A128400 A133591 * A023921 A072840 A091234` `Adjacent sequences: A137640 A137641 A137642 * A137644 A137645 A137646`
	KEYWORD	`nonn`
	AUTHOR	`Alexander Adamchuk (alex(AT)kolmogorov.com), Jan 31 2008`

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Last modified February 16 08:13 EST 2012. Contains 205893 sequences.