4 citations · 13 across the 15 of their papers we have counts for
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Computing the Greatest Common Divisor of Binomial Coefficients
Chai Wah Wu
The greatest common divisor (GCD) of for is known to be some power of 2 times the product of all odd primes p such that . We complete the a…
Faulhaber's formula, Bernoulli numbers, power sums of natural numbers and totatives and the functional equation
Chai Wah Wu
In modern usage the Bernoulli numbers and Bernoulli polynomials follow Euler's approach and are defined using generating functions. Originally, they were derived by Bernoulli while…
Meertens number and its variations
Chai Wah Wu
In 1998, Bird introduced Meertens numbers as numbers that are invariant under a map similar to the Godel encoding. In base 10, the only known Meertens number is 81312000. We look a…
On a conjecture regarding primality of numbers constructed from prepending and appending identical digits
Chai Wah Wu
Consider the operation of adding the same number of identical digits to the left and to the right of a number n. In OEIS sequence A090287, it was conjectured that this operation wi…