id:A118373 - OEIS Search Results

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Product of decimal digits of two successive natural numbers.

+0
1

0, 2, 6, 12, 20, 30, 42, 56, 72, 0, 0, 2, 6, 12, 20, 30, 42, 56, 72, 0, 0, 8, 24, 48, 80, 120, 168, 224, 288, 0, 0, 18, 54, 108, 180, 270, 378, 504, 648, 0, 0, 32, 96, 192, 320, 480, 672, 896, 1152, 0, 0, 50, 150, 300, 500, 750, 1050, 1400, 1800, 0, 0, 72, 216, 432, 720 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`All numbers of the form n(n+1)*k^2, with n>0, are in the sequence.`
	CROSSREFS	`Cf. A002378.` `Sequence in context: A031426 A034100 A034110 this_sequence A077252 A102069 A077253` `Adjacent sequences: A118370 A118371 A118372 this_sequence A118374 A118375 A118376`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), May 15 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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