id:A068883 - OEIS Search Results

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

+0
2

1, 10, 105, 1830, 10585, 107416 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(4) = 1830 is a term as 1, 8, 3 and 0 have odd and even parity alternately.`
	CROSSREFS	`Cf. A068876, A030152, A068882.` `Sequence in context: A024131 A000457 A113348 this_sequence A087599 A068097 A142987` `Adjacent sequences: A068880 A068881 A068882 this_sequence A068884 A068885 A068886`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 19 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.