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A054970 Index numbers for palindromic hexagonal numbers. 3
0, 1, 2, 6, 39, 55, 87, 182, 556, 644, 797, 917, 1593, 1685, 25141, 51425, 55556, 83527, 810311, 1620213, 1853942, 5555556, 17352586, 17835196, 25004441, 91071921, 170563673, 181737182, 184252876, 507354403, 1240058219, 1783816196, 2756800387 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
MATHEMATICA
Select[Range[0, 10^6], PalindromeQ[PolygonalNumber[6, #]] &] (* Robert Price, Apr 27 2019 *)
CROSSREFS
Sequence in context: A072191 A118324 A060421 * A211348 A295912 A120492
KEYWORD
nonn,base
AUTHOR
Jeff Heleen, May 26 2000
EXTENSIONS
Added a(1)=0 by Robert Price, Apr 27 2019
STATUS
approved

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Last modified March 29 08:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)