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A054970 Index numbers for palindromic hexagonal numbers. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..29.

CROSSREFS

Cf. A054969.

Sequence in context: A072191 A118324 A060421 * A211348 A295912 A120492

Adjacent sequences:  A054967 A054968 A054969 * A054971 A054972 A054973

KEYWORD

nonn,base

AUTHOR

Jeff Heleen, May 26 2000

STATUS

approved

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Last modified September 23 05:43 EDT 2018. Contains 315273 sequences. (Running on oeis4.)