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Base 3 numbers d(1)...d(j) such that d(i) != d(j+1-i) for all but 2 values of i.
1

%I #7 Aug 20 2021 13:35:09

%S 4,8,27,29,31,34,37,39,41,43,46,49,51,53,54,55,59,62,65,66,67,71,74,

%T 77,78,79,246,248,249,251,252,254,256,259,261,263,265,268,270,272,274,

%U 277,282,284,285,287,288,290,292,295,297,299,301,304,306,308

%N Base 3 numbers d(1)...d(j) such that d(i) != d(j+1-i) for all but 2 values of i.

%Y Cf. A050876.

%K nonn,base

%O 1,1

%A _Clark Kimberling_

%E Name corrected and missing initial terms inserted by _Sean A. Irvine_, Aug 20 2021