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A119168
Triangular numbers composed of digits {2,5,8}.
2
28, 55, 528, 255255, 525825, 828828, 22528828, 58855825, 88252255, 285258555, 252852582885, 255285258288528, 255828252825225, 825882525828828, 255888285855228855, 555888585855288828885, 55255285258252252552225, 282882828558888582552522225, 528225588525528822525588858528585
OFFSET
1,1
FORMULA
a(n) = A000217(A119169(n)). - Tyler Busby, Mar 28 2023
CROSSREFS
Cf. A000217, A053927, A119169. See A119033 for a table of cross-references.
Sequence in context: A274642 A068129 A079731 * A040756 A135628 A204646
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(18)-a(19) from Tyler Busby, Mar 28 2023
STATUS
approved