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A119055
Triangular numbers composed of digits {0,2,8}.
2
28, 820, 2080, 80200, 200028, 828828, 8002000, 800020000, 8028028828, 22002880200, 80000200000, 208808222028, 220028220028, 8000002000000, 800000020000000, 2880222880828800, 22822222802022028, 80000000200000000, 8000000002000000000, 80820888088020828828
OFFSET
1,1
FORMULA
a(n) = A000217(A119056(n)). - Tyler Busby, Mar 31 2023
CROSSREFS
Cf. A000217, A119056. See A119033 for a table of cross-references.
Sequence in context: A042514 A158659 A214133 * A324450 A377016 A326279
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(19)-a(20) from Tyler Busby, Mar 22 2023
STATUS
approved