A119077 Triangular numbers composed of digits {0,4,9}.

990, 4009490400090, 990440044904409490, 9900404040400404004090

Offset

1,1

Comments

a(5) > 10^40. - Tyler Busby, Mar 28 2023

Links

Table of n, a(n) for n=1..4.

Giovanni Resta, Tridigital Triangular Numbers.

Formula

a(n) = A000217(A119078(n)). - Tyler Busby, Mar 28 2023

Crossrefs

Cf. A000217, A058444, A119078. See A119033 for a table of cross-references.

Sequence in context: A295433 A068301 A119095 * A119057 A218401 A053393

Adjacent sequences: A119074 A119075 A119076 * A119078 A119079 A119080

Keyword

nonn,base,more

Author

Giovanni Resta, May 10 2006

Status

approved