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A108158 Triangular numbers whose 10's complements are squares. 0
1, 6, 36, 91, 2775, 3916, 8911, 394716, 785631, 889111, 961191, 1456071, 5539456, 7704775, 13825911, 39502716, 56440000, 76156311, 88891111, 1507087351, 1764981991, 2530200816, 2743515775, 3950582716, 5119859836, 5468017600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

a(5)=2775 because 10^4 - 2775 = 7225 = 85^2.

CROSSREFS

Sequence in context: A207454 A213189 A080857 * A207559 A207414 A192278

Adjacent sequences:  A108155 A108156 A108157 * A108159 A108160 A108161

KEYWORD

base,easy,nonn

AUTHOR

Jason Earls, Jul 24 2005

STATUS

approved

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Last modified January 29 04:57 EST 2020. Contains 331335 sequences. (Running on oeis4.)