id:A053715 - OEIS Search Results

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Triangular numbers (the sum of the first n integers) in base n.

+0
1

0, 1, 11, 20, 22, 30, 33, 40, 44, 50, 55, 60, 66, 70, 77, 80, 88, 90, 99, 100, 110, 110, 121, 120, 132, 130, 143, 140, 154, 150, 165, 160, 176, 170, 187, 180, 198, 190, 209, 200, 220, 210, 231, 220, 242, 230, 253, 240, 264, 250, 275, 260, 286, 270, 297, 280 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`Apart from a(1), a(2n-1)=10n and a(2n)=11n`
	EXAMPLE	`a(3) = 1+2+3=6 = 20 base 3`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A105958 A124250 A124251 this_sequence A038581 A044054 A044435` `Adjacent sequences: A053712 A053713 A053714 this_sequence A053716 A053717 A053718`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Feb 10 2000`
	EXTENSIONS	`More terms from James A. Sellers (sellersj(AT)math.psu.edu), Feb 22 2000`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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