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A072544 Numbers whose smallest decimal digit is also the initial digit. 4
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 33, 34, 35, 36, 37, 38, 39, 44, 45, 46, 47, 48, 49, 55, 56, 57, 58, 59, 66, 67, 68, 69, 77, 78, 79, 88, 89, 99, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A054054(a(n)) = A000030(a(n));

the sequence differs from A009994, A032857 and A032898: a(65)=121 is not in A009994, a(58)=113 is not in A032857 and a(56)=111 is not in A032898.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

MATHEMATICA

sddiQ[n_]:=Module[{idn=IntegerDigits[n]}, First[idn]==Min[idn]]; Select[ Range[ 0, 130], sddiQ] (* Harvey P. Dale, Oct 30 2011 *)

PROG

(Haskell)

a072544 n = a072544_list !! (n-1)

a072544_list = [x | x <- [0..], a054054 x == a000030 x]

-- Reinhard Zumkeller, Apr 25 2012

CROSSREFS

Cf. A072543, A009994.

Sequence in context: A032898 A131058 A032857 * A009994 A239016 A102827

Adjacent sequences:  A072541 A072542 A072543 * A072545 A072546 A072547

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Aug 04 2002

STATUS

approved

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Last modified October 21 22:13 EDT 2018. Contains 316429 sequences. (Running on oeis4.)