Sum of primes in odd positions is prime: Difference between revisions

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 my @sums = [\+] @odd;
-say .fmt('%5d') for grep { .[1].is-prime }, ( @odd Z @sums );</lang>
+say .fmt('%5d') for grep { .[1].is-prime }, ( (1,3…*) Z @odd Z @sums );</lang>
 {{out}}
-<pre>
+<pre>    1     2     2
-2
+5     7
-7
+31    89
+103   659
-89
+149  1181
-659
+331  5021
-1181
+467  9923
-5021
+499 10909
-9923
+523 11941
-10909
+653 17959
-11941
+823 26879</pre>
-17959
-26879</pre>
 =={{header|REXX}}==