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A121022 Even numbers containing a 2 in their decimal representation. 36
2, 12, 20, 22, 24, 26, 28, 32, 42, 52, 62, 72, 82, 92, 102, 112, 120, 122, 124, 126, 128, 132, 142, 152, 162, 172, 182, 192, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 242, 244, 246, 248, 250, 252 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersection of A005843 and A011532.

REFERENCES

Stees, Ryan, "Sequences of Spiral Knot Determinants" (2016). Senior Honors Projects. Paper 84. James Madison Univ., May 2016; http://commons.lib.jmu.edu/cgi/viewcontent.cgi?article=1043&context=honors201019

LINKS

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

Seong Ju Kim, R. Stees, L. Taalman, Sequences of Spiral Knot Determinants, Journal of Integer Sequences, Vol. 19 (2016), # 16.1.4

Index entries for 10-automatic sequences.

MATHEMATICA

Select[2*Range[200], DigitCount[#, 10, 2]>0&] (* Harvey P. Dale, Nov 04 2013 *)

PROG

(Haskell)

a121022 n = a121022_list !! (n-1)

a121022_list = filter (('2' `elem`) . show) [0, 2 ..]

-- Reinhard Zumkeller, Nov 08 2013

CROSSREFS

Cf. A121041, A011531, A121023, A121024, A121025, A121026, A121027, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040.

Sequence in context: A277964 A043497 A051804 * A277589 A069164 A067762

Adjacent sequences:  A121019 A121020 A121021 * A121023 A121024 A121025

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jul 21 2006

STATUS

approved

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Last modified April 22 06:35 EDT 2019. Contains 322329 sequences. (Running on oeis4.)