A018848 - OEIS

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A018848

Strobogrammatic squares: the same upside down (probably finite).

0, 1, 6889, 69169, 109181601 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	COMMENTS	`Square numbers which when written down and rotated by 180 degrees are unchanged.` `Subsequence of squares in A000787. - Derek Orr and Michel Marcus, Aug 04 2014`
	LINKS	`Table of n, a(n) for n=1..5.`
	CROSSREFS	`Cf. A000787, A018849 (similar sequence).` `Sequence in context: A154086 A064351 A062678 * A031581 A031761 A184791` `Adjacent sequences: A018845 A018846 A018847 * A018849 A018850 A018851`
	KEYWORD	`nonn,base`
	AUTHOR	`David W. Wilson`
	STATUS	`approved`

Last modified April 21 08:20 EDT 2021. Contains 343148 sequences. (Running on oeis4.)