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The next term is 91.

The sequence differences are:

875 - 874 = 1 = 13

874 - 866 = 8 = 23

866 - 839 = 27 = 33

839 - 775 = 64 = 43

775 - 650 = 125 = 53

650 - 434 = 216 = 63

The next difference is 73 (= 343) which is subtracted from 434 to get the next term:

434 - 343 = 91

The sequence is defined as:

U1 = 875

Un+1 = Un - n3 for n > 1

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12y ago

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