It is a sequence of numbers that represents how many spheres you would have in a pyramid of different heights.
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1/6 n(n+1)(n+2)
There can be no answer because a number sequence, in itself, is not a question.
The single number 37111519 does not comprise a sequence.A single number such as 37111519 does not constitute a sequence and so there can be no nth term.
You first have to figure out some rule for the sequence. This can be quite tricky.
An arithmetic sequence is a group or sequence of numbers where, except for the first number, each of the subsequent number is determined by the same rule or set of rules. * * * * * The above answer is incorrect. The rule can only be additive: it cannot be multiplicative or anything else.