A054263 - OEIS

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A054263

Number of palindromic triangular numbers with n digits.

3, 2, 3, 3, 2, 2, 6, 2, 1, 4, 7, 0, 4, 4, 12, 5, 6, 2, 3, 2, 6, 3, 6, 2, 2, 4, 3, 2, 5, 0, 3, 2, 1, 4, 3, 1, 10, 1, 4, 0 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..40.` `P. De Geest, Palindromic Triangulars`
	EXAMPLE	`a(10) = 4: 1264114621, 1634004361, 5289009825, 6172882716.`
	CROSSREFS	`Cf. A000217, A003098, A008509, A008510.` `Sequence in context: A275821 A291674 A265157 * A308656 A178775 A124874` `Adjacent sequences: A054260 A054261 A054262 * A054264 A054265 A054266`
	KEYWORD	`nonn,base,hard`
	AUTHOR	`Patrick De Geest, Apr 15 2000`
	STATUS	`approved`

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Last modified December 3 10:02 EST 2023. Contains 367539 sequences. (Running on oeis4.)