A117404 - OEIS

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A117404

Triangular numbers for which the sum of the digits is a square.

0, 1, 10, 36, 153, 171, 351, 630, 1035, 1431, 2016, 3240, 3321, 4005, 8001, 10440, 13041, 13203, 16110, 21321, 23220, 25200, 67896, 89676, 101025, 105111, 114003, 186966, 187578, 198765, 222111, 239778, 279378, 292995, 299925, 320400, 321201 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	EXAMPLE	`67896 is in the sequence because (1) it is a triangular number and (2) the sum of its digits 6+7+8+9+6=36 is a square.`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A117327 A153371 A169880 * A089222 A139242 A139236` `Adjacent sequences: A117401 A117402 A117403 * A117405 A117406 A117407`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 26 2006`

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Last modified February 16 09:00 EST 2012. Contains 205904 sequences.