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The Encyclopedia of Sequences covers a whole numbers, known as integers. Sequence A000027 describes the basic integer sequence: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10...
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Every sentence accepted by the Encyclopedia is given a unique entry number. Not all are to do with pure mathematics.
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A116448 lists the number of days in a year on each of the planets in our solar system.
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One famous sequence has troubled mathematicians for centuries — the sequence of prime numbers. They are numbers that can only be divided by themselves and 1, but no other whole number.
