id:A117512 - OEIS Search Results

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Triangular numbers for which the sum of the digits is a prime number.

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3, 21, 120, 210, 300, 496, 595, 946, 1378, 1891, 2278, 2485, 2926, 3655, 3916, 4186, 4465, 4753, 5356, 5671, 6328, 6670, 7381, 7750, 8128, 8515, 8911, 9316, 9730, 10011, 10585, 11476, 11935, 12880, 13366, 13861, 14365, 15931, 16471, 18145, 18721 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`595 is in the sequence because (1) it is a triangular number, and (2) the sum of its digits 5+9+5=21 is a prime number.`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A092634 A046727 A084159 this_sequence A068127 A144884 A004658` `Adjacent sequences: A117509 A117510 A117511 this_sequence A117513 A117514 A117515`
	KEYWORD	`nonn,base`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 26 2006`

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

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