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A072956 Turban numbers: without letters r, t, or u. 3
1, 5, 6, 7, 9, 11, 1000000, 1000001, 1000005, 1000006, 1000007, 1000009, 1000011, 5000000, 5000001, 5000005, 5000006, 5000007, 5000009, 5000011, 6000000, 6000001, 6000005, 6000006, 6000007, 6000009, 6000011, 7000000, 7000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

M. J. Halm, Sequences (Re)discovered, Mpossibilities 81 (Aug. 2002).

LINKS

Table of n, a(n) for n=1..29.

PROG

(PARI) is(n)=!setintersect(Set(Vec(English(n))), ["r", "t", "u"]) \\ See A052360 for English(). - M. F. Hasler, Apr 01 2019

CROSSREFS

Cf. A006933 (eban numbers: without 'e'), A008521 (without 'o'), A008523 (without 't'), A008537 (without 'n'), A089590 (without 'u'), A072957 (urban numbers: without r or u), A089589 (without 'i').

Sequence in context: A180939 A229231 A073419 * A241203 A279001 A080708

Adjacent sequences:  A072953 A072954 A072955 * A072957 A072958 A072959

KEYWORD

easy,nonn,word

AUTHOR

Michael Joseph Halm, Aug 13 2002

STATUS

approved

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Last modified October 19 01:25 EDT 2019. Contains 328211 sequences. (Running on oeis4.)