id:A067525 - OEIS Search Results

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Define I(n) = number obtained by incrementing each digit from 1 to 8 of n by 1. A '9' is replaced by a '0'. Sequence gives digitriangular numbers n*I(n)/2.

+0
1

1, 3, 6, 10, 15, 21, 28, 36, 0, 105, 121, 138, 156, 175, 195, 216, 238, 261, 190, 310, 336, 363, 391, 420, 450, 481, 513, 546, 435, 615, 651, 688, 726, 765, 805, 846, 888, 931, 780, 1020, 1066, 1113, 1161, 1210, 1260, 1311, 1363, 1416, 1225, 1525, 1581 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(34) = 3445/2 = 765. a(129) = 129230/2 =14835`
	CROSSREFS	`Sequence in context: A109444 A124157 A033440 this_sequence A130487 A108923 A033441` `Adjacent sequences: A067522 A067523 A067524 this_sequence A067526 A067527 A067528`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 15 2002`
	EXTENSIONS	`More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 28 2002`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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