A079653 Triangular numbers using only the curved digits 0, 3, 6, 8 and 9.

0, 3, 6, 36, 66, 300, 630, 666, 903, 990, 3003, 6903, 33930, 39060, 39903, 63903, 66066, 69006, 93096, 306936, 333336, 339900, 600060, 609960, 630003, 669903, 690900, 833986, 930930, 936396, 963966, 3036880, 3069003, 3083886, 3306306, 3689686, 3966336, 3988900

Offset: 1

Author

Shyam Sunder Gupta, Jan 23 2003

Keywords

• base
• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Intersection of A000217 and A072960.

Programs

Mathematica

t[n_] := n*(n + 1)/2; t /@ Select[Range[0, 10000], AllTrue[IntegerDigits[t[#]], MemberQ[{0, 3, 6, 8 , 9}, #1] &] &] (* Amiram Eldar, Aug 18 2020 *)

Extensions

a(1) = 0 and more terms from Amiram Eldar, Aug 18 2020