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A062285 Numbers with the most significant digit even and alternating parity of digits. 4

%I #7 Feb 14 2017 23:07:02

%S 0,2,4,6,8,21,23,25,27,29,41,43,45,47,49,61,63,65,67,69,81,83,85,87,

%T 89,210,212,214,216,218,230,232,234,236,238,250,252,254,256,258,270,

%U 272,274,276,278,290,292,294,296,298,410,412,414,416,418,430,432,434,436

%N Numbers with the most significant digit even and alternating parity of digits.

%H Reinhard Zumkeller, <a href="/A062285/b062285.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>.

%F (1 - A000030(a(n)) mod 2) * A228710(a(n)) = 1. - _Reinhard Zumkeller_, Aug 31 2013

%e 4325 is a member as the most significant digit is 4 (even) and the subsequent digits 3, 2, 5 are alternately odd and even.

%o (Haskell)

%o a062285 n = a062285_list !! (n-1)

%o a062285_list = filter (even . a000030) a030141_list

%o -- _Reinhard Zumkeller_, Aug 31 2013

%Y Cf. A030142, A030143.

%K nonn,base,easy

%O 1,2

%A _Amarnath Murthy_, Jun 18 2001

%E Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jun 19 2001

%E Offset corrected by and a(1)=0 prepended by _Reinhard Zumkeller_, Aug 31 2013

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Last modified April 16 17:36 EDT 2024. Contains 371749 sequences. (Running on oeis4.)