OFFSET
1,1
LINKS
Giovanni Resta, Tridigital Triangular Numbers
FORMULA
MATHEMATICA
Table[Select[FromDigits/@Tuples[{3, 5, 6}, n], OddQ[Sqrt[8#+1]]&], {n, 15}]//Flatten (* Harvey P. Dale, Aug 03 2021 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(25)-a(26) from Tyler Busby, Mar 24 2023
STATUS
approved