Problem 58946. Count block fountains

A block fountain consists of rows of circles in which each row is a continuous block of circles (i.e., adjacent circles are tangent) and each circle in a row above the first touches exactly two circles on the previous row.
Write a function to compute the number of block fountains with n circles on the first row. For example, there are five block fountains with three circles on the first row.

Solution Stats

71.43% Correct | 28.57% Incorrect
Last Solution submitted on Sep 20, 2023

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