# Questions tagged [digit-sequences]

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### Digits of Pi in colored spiral

In How to make the digits of π go around in a spiral like this? it is described how to plot pi in a spiralform (in my case as binary number): ...
• 93
1k views

### Determining occurrence of a sequence of numbers in the first 50,000 primes

I have to determine how many of the first 50,000 prime numbers (digits) contain the sequence 5, 4, 3, in that order. The numbers don't have to necessarily be consecutive. For example, 566453 is a ...
• 161
321 views

### Self-locating Strings in $\pi$?

According to The Pi-Search Page, in the first 100 million digits of $\pi$ the following numbers are self-locating: 1, 16470, 44899, 79873884. The following inefficient code (which also does not ...
• 2,890
85 views

### Counting the number of Configurations in an Array with Constraints

Consider an array $$\{a_i\}, i=1, ..., N$$ with periodic boundary condition, i.e. $i\equiv i+N$. $a_i\in \{0, 1\}$. I would like to count the number of configurations of the array $\{a_i\}$ satisfying ...
• 251
1 vote
246 views

### Listing all monotone binary functions

A monotone binary function is defined as follows: Given binary vectors $\bf x$ and $\bf y$ (each having $n$ bits) with $\bf x\geq \bf y$, a function $f:\bf x\rightarrow\{0,1\}$ is called monotone if \$...
• 2,465
1 vote
128 views

### Generate a sequence of primes giving position and value of a digit in its digit-decomposed version

The prime sequence starts: ...
1 vote
121 views

### Short Normal Numbers in base 10

Normal numbers in base 10 are those for which, in the base 10 decimal expansion, you can find every natural number. Champernowne's number is a very simple example of this where it is simply written as:...
• 3,015
1 vote