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A117978
Triangular numbers with only even digits.
2
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
OFFSET
1,2
LINKS
Jon E. Schoenfield, Table of n, a(n) for n = 1..10000 (first 1000 terms from Harvey P. Dale)
MATHEMATICA
Select[Accumulate[Range[0, 5000]], Count[IntegerDigits[#], _?(OddQ)] ==0&] (* Harvey P. Dale, Oct 21 2011 *)
CROSSREFS
Sequence in context: A014635 A227970 A034955 * A119174 A326134 A343512
KEYWORD
base,nonn
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), May 03 2006
EXTENSIONS
Corrected (a(32) was in error) and extended by Harvey P. Dale, Oct 21 2011
STATUS
approved