351
This number is a composite.
Just showing those entries submitted by 'Gaydos': (Click here to show all)
The sum of the first four Honaker numbers equals the 26th triangular number (351). Are any other triangular numbers the sum of the first n Honaker numbers? [Gaydos]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean