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A117990
Pentagonal numbers with only even digits.
2
0, 22, 2262, 2882, 8400, 8626, 40262, 80620, 86280, 224460, 244622, 288862, 442002, 468442, 606426, 866020, 2000460, 2628802, 4028662, 4624426, 4640242, 4666662, 6664442, 8044626, 8268482, 8602840, 20622042, 20800402, 22024420, 22428600, 22440202, 22486640, 22626242
OFFSET
1,2
LINKS
MATHEMATICA
Select[Table[n*(3*n - 1)/2, {n, 0, 10^4}], AllTrue[IntegerDigits[#], EvenQ] &] (* Amiram Eldar, Feb 06 2021 *)
CROSSREFS
Intersection of A000326 and A014263.
Cf. A117985.
Sequence in context: A114449 A069221 A069222 * A098130 A078278 A231053
KEYWORD
nonn,base
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), May 03 2006
EXTENSIONS
a(1)=0 and a missing term inserted by Amiram Eldar, Feb 06 2021
STATUS
approved