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A117978
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Triangular numbers with only even digits.
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1
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0, 6, 28, 66, 406, 666, 820, 2080, 2628, 8646, 28680, 42486, 48828, 64620, 66066, 80200, 84666, 200028, 204480, 228826, 264628, 288420, 426426, 446040, 468028, 484620, 600060, 626640, 644680, 686206, 828828, 886446, 2222886, 2248260, 2862028, 2888406
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Harvey P. Dale, Table of n, a(n) for n = 1..1000
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MATHEMATICA
| Select[Accumulate[Range[0, 5000]], Count[IntegerDigits[#], _?(OddQ)] ==0&] (* From Harvey P. Dale, Oct 21 2011 *)
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CROSSREFS
| Cf. A000217.
Sequence in context: A033588 A014635 A034955 * A119174 A144945 A202956
Adjacent sequences: A117975 A117976 A117977 * A117979 A117980 A117981
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KEYWORD
| base,nonn
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AUTHOR
| Luc Stevens (lms022(AT)yahoo.com), May 03 2006
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EXTENSIONS
| Corrected (a(32) was in error) and extended by Harvey P. Dale, Oct 21 2011
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