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A083203 a(1) = 1, then smallest number not included earlier such that a(n)*a(n+1) + 1 is a cube. 7
1, 7, 9, 38, 35, 117, 91, 8, 614, 39312, 167143, 9225632, 27823518, 3438671571811, 810534219404852834, 350099109163999874259659131507909, 538073411436415103320989698699207584507533583587852139 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The next 3 terms are (to 2 significant digits) 4.1*10^95, 1.3*10^183, 3.6*10^351.

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

7*9 + 1 = 64 = 8^3, 9*38 + 1 = 343= 7^3.

CROSSREFS

Cf. A083204, A082536.

Cf. A091569.

Sequence in context: A189974 A316184 A321760 * A082536 A057590 A140787

Adjacent sequences:  A083200 A083201 A083202 * A083204 A083205 A083206

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Apr 28 2003

EXTENSIONS

Corrected and extended by Vladeta Jovovic, May 01 2003

More terms from Michel ten Voorde Jun 23 2003

More terms from Vladeta Jovovic, Jun 29 2003

a(15) - a(17) from David Wasserman, Mar 18 2004

More terms from David Wasserman, May 20 2004

STATUS

approved

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Last modified May 17 14:19 EDT 2022. Contains 353746 sequences. (Running on oeis4.)