A117990 Pentagonal numbers with only even digits.

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

David A. Corneth, Table of n, a(n) for n = 1..10000

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

Adjacent sequences: A117987 A117988 A117989 * A117991 A117992 A117993

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