Question 853892
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Hi,
{{{n[10] = a[1] + 9d = 53 }}}
{{{n[6] = a[1] + 5d = 37}}}   |Subtracting 2nd from 1st EQ
            4d = 16
         {{{ highlight_green(d = 4)}}}  (and {{{a[1]}}} = 17 )
(17, 21, 25, 29, 33, 37, 41, 45, 49, 53,  ...}