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A072960 Numbers using only the curved digits 0, 3, 6, 8 and 9. 13
0, 3, 6, 8, 9, 30, 33, 36, 38, 39, 60, 63, 66, 68, 69, 80, 83, 86, 88, 89, 90, 93, 96, 98, 99, 300, 303, 306, 308, 309, 330, 333, 336, 338, 339, 360, 363, 366, 368, 369, 380, 383, 386, 388, 389, 390, 393, 396, 398, 399, 600, 603, 606, 608, 609, 630, 633, 636, 638 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Exponential density 0.69897... = log 5/log 10. A 10-automatic sequence. - Charles R Greathouse IV, Jul 22 2012

REFERENCES

M. J. Halm, Three Boxes, Puzzle-M Magazine (Apr. 1987).

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..1000

Index entries for 10-automatic sequences.

MATHEMATICA

f[n_] := Block[{id = IntegerDigits[n], curve = {0, 3, 6, 8, 9}}, If[ Union[ Join[id, curve]] == curve, True, False]]; Select[ Range[0, 240], f[ # ] & ]

PROG

(PARI) isok(n)= my(d = Set(digits(n))); for (k=1, #d, if (vecsearch([1, 2, 4, 5, 7], d[k]), return (0))); 1; \\ Michel Marcus, May 11 2016

(Python)

from itertools import product

A072960_list = [0] + [int(a+''.join(b)) for l in range(5) for a in '3689' for b in product('03689', repeat=l)] # Chai Wah Wu, May 12 2016

CROSSREFS

Sequence in context: A231011 A196370 A005622 * A159264 A055073 A012132

Adjacent sequences:  A072957 A072958 A072959 * A072961 A072962 A072963

KEYWORD

easy,nonn,base

AUTHOR

Michael Joseph Halm, Aug 13 2002

EXTENSIONS

Corrected by Rick L. Shepherd, Aug 13 2002

Offset corrected by Arkadiusz Wesolowski, Aug 15 2011

STATUS

approved

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Last modified May 23 08:03 EDT 2017. Contains 286909 sequences.