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A242367 Numbers whose parity matches only their least significant decimal digit. 0

%I #26 May 13 2014 08:03:29

%S 1,2,3,4,5,6,7,8,9,10,12,14,16,18,21,23,25,27,29,30,32,34,36,38,41,43,

%T 45,47,49,50,52,54,56,58,61,63,65,67,69,70,72,74,76,78,81,83,85,87,89,

%U 90,92,94,96,98,110,112,114,116,118,130,132,134,136,138

%N Numbers whose parity matches only their least significant decimal digit.

%C There are 9*5^(n-1) n-digit terms, hence a(n) << n^k with k = log 5/log 10 = 0.69897.... - _Charles R Greathouse IV_, May 12 2014

%e 100 is not in the sequence since 100 is even but has 2 even digits (both the second and third digits).

%e 998 is in the sequence since 998 is even and the only even digit is the final digit.

%K nonn,base

%O 1,2

%A _J. Lowell_, May 12 2014

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)