=begin
Pattern Explanation:
The sequence is: 8, 64, 80, 136, 152
Compute the differences between consecutive numbers:
64 - 8 = 56
80 - 64 = 16
136 - 80 = 56
152 - 136 = 16
The pattern clearly alternates:
+56, +16, +56, +16, ...
8 + 56 = 64
64 + 16 = 80
80 + 56 = 136
136 + 16 = 152
This alternating pattern continues forever.
Even-term formula:
Term(2) = 64
Each pair adds: 56 + 16 = 72
Number of even terms up to Term(100):
100 / 2 = 50 even terms
Number of full pairs after Term(2):
50 - 1 = 49 pairs
Formula for even terms:
Term(n) = 64 + 72 × (n/2 - 1)
For n = 100:
Term(100) = 64 + 72 × 49 = 3592
=end
# ------------------------------------------------------------
# Function to compute the nth term using the even-term formula
# ------------------------------------------------------------
def nth_term(n)
return 8 if n == 1 # first term is fixed
if n.even?
# Even term formula
64 + 72 * (n / 2 - 1)
else
# Odd term = previous even term + 16
even_term = 64 + 72 * ((n - 1) / 2 - 1)
even_term + 16
end
end
n = 100
result = nth_term(n)
puts "The 100th term of the sequence is: #{result}"
=begin
Run:
The 100th term of the sequence is: 3592
=end
