Question 139230
formula is (N+1)
here you have a sequence of +3,+4,+5,+6,+7,+8 +9 
0,3,7,12,18,25,33,42
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for the next 3 I use a very unconventional method that is too complicated to explain:
please let me know it they are acceptable?????????
2,-2,-18,-52,-110,-198,-322,-488,-702
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4,23,64,133,236,379,568,809,1108
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-5,-9,-19,-35,-57,-85,-119,-159,-205