A095781 Values of n for which A095777(n) is 12 (those terms which are expressible in decimal digits for bases 2 through 13, but not for base 14).

13, 26, 27, 39, 40, 41, 52, 53, 55, 66, 67, 68, 69, 80, 81, 96, 97, 108, 169, 170, 171, 172, 173, 174, 176, 177, 182, 183, 184, 185, 187, 188, 189, 195, 209, 221, 222, 223, 248, 249, 290, 291, 292, 293, 338, 339, 341, 342, 343, 344, 345, 364, 365, 366, 367, 368

Offset: 1

Author

Chuck Seggelin (seqfan(AT)plastereddragon.com), Jun 05 2004

Keywords

• base
• nonn

Examples

			a(5)=40 because 40 when expressed in successive bases starting at 2 will produce its first non-decimal digit at base 14. Like so: 101000, 1111, 220, 130, 104, 55, 50, 44, 40, 37, 34, 31. In base 14, 40 is 2C.
		

Crossrefs

Cf. A095777.

Programs

Maple

S := []; for n from 1 to 1000 do; if 1>0 then; ct := 0; ok := true; b := 2; if (n>9) then; while ok=true do; L := convert(n, base, b); for e in L while ok=true do; if (e > 9) then ok:=false; fi; od; if ok=true then; ct := ct + 1; b := b + 1; fi; od; fi; if ct=12 then S := [op(S), n]; fi; fi; od; S;