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Is this one or more sequences?
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Sometimes there's the question Is this one or more sequences?
Sequences of fractions
The numerators form one sequence of integers, the denominators another. For example, A076512 (numerators: {1, 1, 2, 1, 4, 1, 6, 1, 2, 2, 10, 1, 12, 3, 8, 1, 16, 1, ...}) and A109395 (denominators: {1, 2, 3, 2, 5, 3, 7, 2, 3, 5, 11, 3, 13, 7, 15, 2, 17, 3, ...}) of
Unless a sequence of unit fractions already have the numerators in A000012.
Sequences of sets of numbers with each set the same length
For example, Pythagorean triples A020883 Ordered long legs of primitive Pythagorean triangles.
{4, 12, 15, 21, 24, 35, 40, 45, 55, 56, 60, 63, 72, 77, 80, 84, 91, 99, 105, 112, 117, 120, 132, 140, 143, 144, 153, 156, 165, 168, 171, 176, 180, 187, 195, 208, 209, 220, 221, 224, 231, 240, 247, 252, 253, ...}
A009012 Ordered long legs of Pythagorean triangles.
{4, 8, 12, 12, 15, 16, 20, 21, 24, 24, 24, 28, 30, 32, 35, 36, 36, 40, 40, 42, 44, 45, 45, 48, 48, 48, 52, 55, 56, 56, 60, 60, 60, 60, 63, 63, 64, 68, 70, 72, 72, 72, 72, 75, 76, 77, 80, 80, 80, 84, 84, 84, 84, ...}
A046084 The middle member of the Pythagorean triples ordered by increasing .
{4, 8, 12, 12, 15, 16, 20, 24, 24, 21, 24, 30, 28, 35, 36, 32, 40, 36, 40, 48, 45, 48, 45, 44, 42, 48, 60, 52, 56, 60, 63, 60, 56, 55, 70, 60, 72, 72, 64, 80, 68, 75, 77, 84, 63, 80, 72, 84, 76, 72, 80, 96, 99, ...}