A284062 - OEIS

A284062

Numbers whose smallest decimal digit is 1.

1, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 31, 41, 51, 61, 71, 81, 91, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125, 126, 127, 128, 129, 131, 132, 133, 134, 135, 136, 137, 138, 139, 141, 142, 143, 144, 145, 146, 147, 148, 149, 151, 152

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OFFSET

1,2

COMMENTS

Numbers k such that A054054(k) = 1.

Prime terms are in A106101.

LINKS

Table of n, a(n) for n=1..56.

MATHEMATICA

Select[Range[300], Min[IntegerDigits[#]]==1 &] (* Indranil Ghosh, Mar 19 2017 *)

PROG

(Magma) [n: n in [1..100000] | Minimum(Setseq(Set(Sort(&cat[Intseq(n)])))) eq 1]

(PARI) for(n=1, 300, if(vecmin(digits(n))==1, print1(n, ", "))) \\ Indranil Ghosh, Mar 19 2017

(Python)

from sympy.ntheory.factor_ import digits

print([n for n in range(1, 301) if min(digits(n)[1:])==1]) # Indranil Ghosh, Mar 19 2017

CROSSREFS

Cf. Sequences of numbers whose smallest decimal digit is k (for k = 0..9): A011540 (k = 0), this sequence (k = 1), A284063 (k = 2), A284064 (k = 3), A284065 (k = 4), A284066 (k = 5), A284067 (k = 6), A284068 (k = 7), A284069 (k = 8), A002283 (k = 9).

Sequence in context: A293728 A070255 A267085 * A261020 A308237 A362023

Adjacent sequences: A284059 A284060 A284061 * A284063 A284064 A284065

KEYWORD

nonn,base

AUTHOR

Jaroslav Krizek, Mar 19 2017

STATUS

approved