How would you write an implicit or explicit recursive verb for this sequence formula?
a1=.4 a1 , (a2=.1-~2*a1) , (a3=.1+~2*a2) , (a4=.1-~2*a3) , (a5=.1+~2*a4) ... (an=.1(+-)~2*an-1 The verb would be specified as x f y, where x is the starting integer a1, and y is the number of terms (n) - or vice versa. The result will be a vector n items long. Note the alternating sign in each term Example: 4 f 5 4 7 15 29 59 Skip ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
