Problem 55695. AZPC Oddly Triangular: N=8/9 Digits 3/7/9 Part 2 of 5

AZPC created the Oddly Triangular contest on 9/7/22. The challenge is to find the longest sequence of N odd digits such that sum(1:value) is composed of only odd digits. The contest ended on 9/8/22 as Rokicki created a 3.6 million digit solution with the implication that an infinite length pattern had been determined. [N=2, 17, sum(1:17)=153]
This is step two of the steps and processing types to find Rokicki's result.
This challenge is to find a solution subset with lengths 8 and 9 that only use the digits 3/7/9 in M. The sum(1:M(i)) may only use odd digits. Normal double variables will not suffice for the N=9 solution as the eps is 8 for the sum. There are 8 length 8 solutions if all odd digits are allowed. Rokicki focused on patterns using only 3/7/9 to reduce his search space.
Usage of matlab java math can be seen in the Test Suite. A function zcombvec is given in the function template to facilitate creation of all vectors that only use the 3/7/9 digits. Usage of zcombvec is not required.
M=OddlyTri_379(N,Q) where N=digit length, Q=number of solutions, M is a double vector of the Q values.

Solution Stats

100.0% Correct | 0.0% Incorrect
Last Solution submitted on Sep 25, 2022

Solution Comments

Show comments

Problem Recent Solvers5

Suggested Problems

More from this Author296

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!