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A057106 Numbers n such that n(3n-2) is an octagonal palindrome. 2
1, 2, 52, 6331, 6431, 7341, 7863, 426115, 453486, 1054067, 1054167, 1472746, 2017631, 42687015, 1050553507, 13175129925, 335038979077, 1400295262095, 5847307263801, 51722791547842, 78849864240621, 105802560494387 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

P. De Geest, Palindromic Octagonals

CROSSREFS

Cf. A057107, A000567.

Sequence in context: A246485 A121293 A246743 * A080973 A230882 A216354

Adjacent sequences:  A057103 A057104 A057105 * A057107 A057108 A057109

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Aug 15 2000.

EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Apr 17 2008

STATUS

approved

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Last modified October 20 17:39 EDT 2017. Contains 293648 sequences.