# code: http://golf.shinh.org/reveal.rb?A006530/tails_1644995382&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

#(implicit map with implicit range):[int] 
    fstInt #($):int 
    \B A 
    / #(foldr1):int 
        | #(filter):[int] 
            \ #(reverse):[int] 
                , #(range from 1):[int] 
                    B #($):int 
            \C 
            - #(subtract):int 
                - #(subtract):int 
                    3 #(integer):int 
                    , #(length):int 
                        | #(filter):[int] 
                            , #(range from 1):[int] 
                                C #($):int 
                            ~ #(not):null 
                            \D 
                            % #(modulus):int 
                                C #(@):int 
                                D #($):int 
                % #(modulus):int 
                    B #(@):int 
                    #(implicit arg = C):int 
        #\F E 
        #(implicit arg = F):int