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A119150 Triangular numbers composed of digits {1,8,9}. 2
1, 91, 1891, 8911, 188191, 889111, 899811, 998991, 1188111, 11899881, 88891111, 1918188891, 8888911111, 9998888991, 189889118191, 191819818191, 199198198891, 888889111111, 88888891111111, 8888888911111111, 888888889111111111, 88888888891111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..22.
Giovanni Resta, Tridigital Triangular Numbers
FORMULA
a(n) = A000217(A119151(n)). - Michel Marcus, Mar 24 2023
CROSSREFS
Cf. A000217, A053915, A119151. See A119033 for a table of cross-references.
Sequence in context: A184462 A229518 A118706 * A008394 A332949 A221738
Adjacent sequences: A119147 A119148 A119149 * A119151 A119152 A119153
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(21)-a(22) from Tyler Busby, Mar 24 2023
STATUS
approved

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Last modified August 18 10:08 EDT 2024. Contains 375264 sequences. (Running on oeis4.)