Random triples
| Subject | Object |
|---|---|
| gptkb:Ulam_numbers | The sequence starts with 1 and 2; each subsequent term is the smallest integer that is the sum of two distinct earlier terms in exactly one way. |
| gptkb:OEIS_A001349 | a(n) = binomial(2n, n) |
| gptkb:Pratt's_increment | all numbers of the form 2^p * 3^q, for non-negative integers p and q, in increasing order |