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A045808 8-ish numbers (end in 67, 69, 81, 83). 2
67, 69, 81, 83, 167, 169, 181, 183, 267, 269, 281, 283, 367, 369, 381, 383, 467, 469, 481, 483, 567, 569, 581, 583, 667, 669, 681, 683, 767, 769, 781, 783, 867, 869, 881, 883, 967, 969, 981, 983, 1067, 1069, 1081, 1083, 1167, 1169, 1181, 1183, 1267, 1269 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

FORMULA

Empirical G.f.: x*(67+2*x+12*x^2+2*x^3+17*x^4)/(1-x-x^4+x^5). [Colin Barker, Jan 23 2012]

MATHEMATICA

Select[Range[1300], MemberQ[{67, 69, 81, 83}, Mod[#, 100]]&] (* Harvey P. Dale, Jul 03 2013 *)

PROG

(Haskell)

import Data.List (findIndices)

a045808 n = a045808_list !! (n-1)

a045808_list = findIndices (`elem` [67, 69, 81, 83]) $ cycle [0..99]

-- Reinhard Zumkeller, Jan 23 2012

CROSSREFS

Cf. A045800-A045809.

Cf. A045572, A045797, A045798.

Sequence in context: A196251 A246783 A169936 * A073523 A295803 A033243

Adjacent sequences:  A045805 A045806 A045807 * A045809 A045810 A045811

KEYWORD

nonn,base,easy

AUTHOR

J. H. Conway.

EXTENSIONS

More terms from Erich Friedman.

STATUS

approved

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Last modified May 25 03:14 EDT 2019. Contains 323539 sequences. (Running on oeis4.)