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Sequences

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Seven

Add next number.

1,2,3,8,18, ..

Tip: Seven of Romans ...

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Seven 2

Add next number:
1,2,3,8,19,...
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A crab one
zaflap, vatebo, ramagi, ?
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?XVIII

28, 68, 118, 1018, etc.

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I, II, III, VIII, XVIII, XXVIII, XXXVIII, LXXXVIII, CLXXXVIII, CCLXXXVIII, CCCLXXXVIII, DCCCLXXXVIII, MDCCCLXXXVIII, etc.



So, it becomes 1, 2, 3, 8, 18, 28, 38, 88, 188, 288, 388, 888, 1888, etc.
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