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Concrete Mathematics: A Foundation for Computer Science, Second Edition by Oren Patashnik, Donald E. Knuth, Ronald L. Graham

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6. Special Numbers

Some sequences of numbers arise so often in mathematics that we recognize them instantly and give them special names. For example, everybody who learns arithmetic knows the sequence of square numbers Image1, 4, 9, 16, . . .Image. In Chapter 1 we encountered the triangular numbers Image1, 3, 6, 10, . . .Image; in Chapter 4 we studied the prime numbers ...

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