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A284068
Numbers whose smallest decimal digit is 7.
7
7, 77, 78, 79, 87, 97, 777, 778, 779, 787, 788, 789, 797, 798, 799, 877, 878, 879, 887, 897, 977, 978, 979, 987, 997, 7777, 7778, 7779, 7787, 7788, 7789, 7797, 7798, 7799, 7877, 7878, 7879, 7887, 7888, 7889, 7897, 7898, 7899, 7977, 7978, 7979, 7987, 7988, 7989
OFFSET
1,1
COMMENTS
Numbers n such that A054054(n) = 7.
Prime terms are in A106107.
MATHEMATICA
Select[Range[8000], Min[IntegerDigits[#]] == 7 &] (* Giovanni Resta, Mar 23 2017 *)
PROG
(Magma) [n: n in [1..100000] | Minimum(Setseq(Set(Sort(&cat[Intseq(n)])))) eq 7]
(PARI) isok(n) = vecmin(digits(n)) == 7; \\ Michel Marcus, Mar 25 2017
CROSSREFS
Cf. Sequences of numbers whose smallest decimal digit is k (for k = 0..9): A011540 (k = 0), A284062 (k = 1), A284063 (k = 2), A284064 (k = 3), A284065 (k = 4), A284066 (k = 5), A284067 (k = 6), this sequence (k = 7), A284069 (k = 8), A002283 (k = 9).
Sequence in context: A215515 A215518 A166169 * A153688 A059195 A139264
KEYWORD
nonn,base
AUTHOR
Jaroslav Krizek, Mar 23 2017
STATUS
approved