This will probably lead to a change in the problem description, so I'll let you guys know here,
I've found a mistake with this problem. I've laid my entire strategy out in the problem 44 thread, so check it out there:
https://projecteuler.net/thread=44&page=9#last
Cheers, Lukas
Problem 044
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Don't start begging others to give partial answers to problems
Don't ask for hints how to solve a problem
Don't start a new topic for a problem if there already exists one
See also the topics:
Don't post any spoilers
Comments, questions and clarifications about PE problems.
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v6ph1
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Re: Problem 044
Remember to calculate the correct difference!
I was iterating "a difference" and lost track that it is actually part of the answer,
but not the correct part.
So with the example and let's assume 48 is pentagonal, I took:
P4 = P8-P7 = 22 as the solution, using P4 is "the" difference, but it's not!
Correct needs to be:
D = P7-P4 = 48 (again, assumption 48 is pentagonal)
I was iterating "a difference" and lost track that it is actually part of the answer,
but not the correct part.
So with the example and let's assume 48 is pentagonal, I took:
P4 = P8-P7 = 22 as the solution, using P4 is "the" difference, but it's not!
Correct needs to be:
D = P7-P4 = 48 (again, assumption 48 is pentagonal)