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A057107 Octagonal palindromes. 2
1, 8, 8008, 120232021, 124060421, 161656161, 185464581, 544721127445, 616947749616, 3333169613333, 3333802083333, 6506939396056, 12212500521221, 5466543663456645, 3310988011108890133, 520752145595541257025 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

P. De Geest, Palindromic Octagonals

CROSSREFS

Cf. A057106, A000567.

Sequence in context: A090494 A079656 A114773 * A052152 A189250 A217025

Adjacent sequences:  A057104 A057105 A057106 * A057108 A057109 A057110

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Aug 15 2000.

STATUS

approved

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Last modified April 20 22:29 EDT 2014. Contains 240823 sequences.