Source: wikibot/keith-number
= Keith number
{wiki=Keith_number}
A Keith number is a type of integer that relates to sequences derived from the digits of a number. Given a positive integer \\( n \\), it is represented in its decimal form. The digits of \\( n \\) are used to create a sequence where the first terms are derived from the digits of \\( n \\) and each subsequent term is the sum of the last \\( d \\) terms, where \\( d \\) is the number of digits in \\( n \\).