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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
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.
EXAMPLE
7*9 + 1 = 64 = 8^3, 9*38 + 1 = 343= 7^3.
CROSSREFS
Cf. A091569.
Sequence in context: A316184 A359367 A321760 * A082536 A057590 A140787
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