id:A083748 - OEIS Search Results

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Star numbers (A003154) whose digital sum and product of nonzero digits are both triangular numbers.

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1, 37, 73, 433, 15301, 39853, 66781, 78661, 110161, 146953, 156493, 202033, 220033, 305101, 355753, 416593, 509833, 593461, 805933, 1011061, 1503001, 1563661, 2952613, 4000033, 4019653, 4609513, 5262193, 6211837, 6359221, 6608701 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(2)=37 because` `........()........` `.......()().......` `..()()()()()()()..` `...()()()()()()...` `....()()()()()....` `...()()()()()()...` `..()()()()()()()..` `.......()().......` `........()........` `and 3+7 is` `....()....` `...()()...` `..()()()..` `.()()()().` `and 3*7 is` `......()......` `.....()().....` `....()()()....` `...()()()()...` `..()()()()()..` `.()()()()()().`
	CROSSREFS	`Sequence in context: A069204 A128388 A137833 this_sequence A083990 A123815 A087531` `Adjacent sequences: A083745 A083746 A083747 this_sequence A083749 A083750 A083751`
	KEYWORD	`base,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jun 17 2003`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research