Number Serial Inwards Math

If the tribes of a sequence are summed upward as well as thence a serial volition hold upward formed.

For example:
Row of natural numbers 1, 2, 3, 4, ... the serial of the master numbers is: 1 + 2 + three + iv + ....

To state the amount of a serial is commonly denoted past times the missive of the alphabet S. Suppose:
The starting fourth dimension ii tribes are denoted past times S₂.

Example of Number series

Please stimulate upward one's involve heed the starting fourth dimension 2 tribes of 1 + five + nine + thirteen + ...!

Answer
S₂ = 1 + 5
S₂ = 6

So the starting fourth dimension 2 tribes of 1 + five + nine + thirteen + ... are 6.

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