These sequences belong to combinatorics, a branch of mathematics that deals with number patterns in sets of elements. The most famous combinatorics sequence, called the Catalan numbers ...

The numbers in this sequence are decreasing. The term-to-term rule is -5.The next term in the sequence is 11 (16 − 5). Look at the difference between one pattern and the next in the sequence.

Las Vegas(KLAS)-The new drama “Prime Target” features a brilliant young math postgraduate ... If he succeeds in finding a pattern in prime numbers, he will hold the key to every computer ...