|
%I #12 Apr 06 2023 21:41:54
%S 6,66,666,2926,29962999696266,226966926929226,9996922966699222296,
%T 296292269222296622226,22266696966226666966622226,
%U 266669269626696962299266226222926
%N Triangular numbers composed of digits {2,6,9}.
%C a(11) > 10^40. - _Tyler Busby_, Mar 28 2023
%H Giovanni Resta, <a href="http://www.numbersaplenty.com/tr/tr269.html">Tridigital Triangular Numbers</a>.
%F a(n) = A000217(A119177(n)). - _Tyler Busby_, Mar 28 2023
%Y Cf. A000217, A053931, A119177. See A119033 for a table of cross-references.
%K nonn,base,more
%O 1,1
%A _Giovanni Resta_, May 10 2006
%E a(10) from _Tyler Busby_, Mar 28 2023
|
