OFFSET
1,2
LINKS
Giovanni Resta, Tridigital Triangular Numbers
FORMULA
MATHEMATICA
Table[Select[FromDigits/@Tuples[{1, 4, 6}, n], OddQ[Sqrt[8#+1]]&], {n, 16}]//Flatten (* Harvey P. Dale, Jun 20 2023 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(22)-a(24) from Tyler Busby, Mar 22 2023
a(25) from Harvey P. Dale, Jun 20 2023
STATUS
approved