A095783 Values of n for which A095777(n) is 14 (those terms which are expressible in decimal digits for bases 2 through 15, but not for base 16).

15, 30, 31, 45, 60, 61, 78, 79, 91, 92, 93, 225, 228, 229, 242, 243, 247, 255, 451, 456, 457, 510, 511, 525, 588, 589, 590, 591, 676, 677, 678, 679, 680, 690, 691, 693, 798, 799, 1014, 1023, 1036, 1185, 1190, 1191, 1192, 1372, 1373, 1386, 1387, 1404, 3458

Offset: 1

Author

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

Keywords

• base
• nonn

Examples

			a(5)=60 because 60 when expressed in successive bases starting at 2 will produce its first non-decimal digit at base 16. Like so: 111100, 2020, 330, 220, 140, 114, 74, 66, 60, 55, 50, 48, 44, 40. In base 16, 60 is 3C.
		

Crossrefs

Cf. A095777.

Programs

Maple

S := []; for n from 1 to 5000 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=14 then S := [op(S), n]; fi; fi; od; S;