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A043061
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(s(n)+4)/7, where s(n)=n-th base 7 palindrome that starts with 3.
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0
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1, 4, 22, 23, 24, 25, 26, 27, 28, 148, 156, 164, 172, 180, 188, 196, 1030, 1037, 1044, 1051, 1058, 1065, 1072, 1080, 1087, 1094, 1101, 1108, 1115, 1122, 1130, 1137, 1144, 1151, 1158, 1165, 1172, 1180, 1187, 1194, 1201, 1208
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