A284068 Numbers whose smallest decimal digit is 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.

Links

Table of n, a(n) for n=1..49.

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

Adjacent sequences: A284065 A284066 A284067 * A284069 A284070 A284071

Keyword

nonn,base

Author

Jaroslav Krizek, Mar 23 2017

Status

approved