id:A068884 - OEIS Search Results

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Largest n-digit triangular number with property that digits alternate in parity, or 0 if no such number exists.

+0
1

6, 78, 903, 9870, 96141 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(4) = 9870 is a term as 9, 8, 7 and 0 have odd and even parity alternately.`
	CROSSREFS	`Cf. A068876, A068879, A068882, A068883.` `Adjacent sequences: A068881 A068882 A068883 this_sequence A068885 A068886 A068887` `Sequence in context: A116280 A134788 A069669 this_sequence A069670 A074112 A131926`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 19 2002`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.