Question: Creating Recurision in maple 11 tia sal2

Greetings all I know I can get the odd numbers and even numbers using the following command

oddnum := seq(2*j+1, j = 0 .. 13);


evennum := seq(2*j, j = 0 .. 13);



But I would like to get a sequency like this

0,1,4,5,8,9  where it does two numbers in sequency then skips the next two


2,3,6,7,10,11 where it starts at two the three then skips two numbers

I know it's a recursion but I'm not sure how to change it?

Can anyone recommend a simple online book or online video

tia sal2

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