A068818 a(n) = smallest triangular number having no digit in common with the previous term, with a(1) = 1.

1, 3, 6, 10, 28, 36, 45, 66, 78, 91, 253, 406, 528, 630, 741, 820, 946, 1035, 2278, 3003, 4186, 5050, 6216, 7503, 8128, 9045, 11628, 33930, 41616, 52003, 61776, 80200, 93961, 200028, 311655, 422740, 511566, 723003, 846951, 3027030, 4114146, 5000703, 6168828

Offset

1,2

Links

Jayanta Basu and T. D. Noe, Table of n, a(n) for n = 1..100 (first 69 terms from Jayanta Basu)

Mathematica

t = {}; p = 1; Do[If[Intersection @@ IntegerDigits /@ {x = n*(n + 1)/2, p} == {}, AppendTo[t, p]; p = x], {n, 2, 5000}]; t (* Jayanta Basu, Aug 07 2013 *)

Crossrefs

Sequence in context: A364170 A211231 A302094 * A068866 A137173 A116544

Adjacent sequences: A068815 A068816 A068817 * A068819 A068820 A068821

Keyword

nonn,base

Author

Amarnath Murthy, Mar 07 2002

Extensions

Corrected and extended by Sascha Kurz, Mar 27 2002

Additional terms from Jayanta Basu, Aug 07 2013

Status

approved