A note on -nary adjacent-error-correcting codes

Binary group codes described by Abramson permit the correction of all single errors and all double errors in adjacent digits, with the use of significantly fewer check digits than codes capable of correcting all double-bit errors. This note considers the generalization of Abramson\´s codes to the -nary case, where a symbol alphabet consisting of the digits is used for transmission, being a prime number. Examples of such -nary codes are given, as well as necessary conditions for their existence. These codes bear the same relation to the -nary Golay codes as Abramson\´s codes do to the familiar Hamming codes. Some as yet unanswered questions are raised, and suggestions for further possible generalizations are given.