id:A118468 - OEIS Search Results

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Numbers n for which the sum of the digits plus the sum of the digits of the square, equals the sum of the digits of the cube.

+0
1

0, 9, 18, 27, 36, 45, 54, 72, 90, 99, 108, 135, 162, 180, 189, 198, 216, 225, 243, 270, 288, 306, 315, 333, 360, 405, 432, 441, 450, 495, 504, 513, 522, 531, 540, 594, 603, 612, 621, 639, 648, 657, 666, 675, 720, 765, 783, 801, 819, 837, 846, 855, 873, 882 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`s(n) stands for the sum of the digits of n.`
	FORMULA	`s(n)+s(n^2)=s(n^3)`
	EXAMPLE	`45 is in the sequence because (1) the sum of the digits is 4+5=9, (2) the sum of the digits of 45^2 = 2025 is 2+0+2+5=9, (3) the sum of the digits of 45^3=91125 is 9+1+1+2+5=18 and (4) 9+9=18`
	CROSSREFS	`Sequence in context: A020336 A044834 A033006 this_sequence A083497 A067552 A052489` `Adjacent sequences: A118465 A118466 A118467 this_sequence A118469 A118470 A118471`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), May 04 2006`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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