115231
domain: N
Appears in sequences
- Strong pseudoprimes to base 11.at n=28A020237
- Strong pseudoprimes to base 12.at n=34A020238
- Strong pseudoprimes to base 52.at n=29A020278
- Strong pseudoprimes to base 61.at n=25A020287
- Strong pseudoprimes to base 69.at n=36A020295
- Strong pseudoprimes to base 74.at n=31A020300
- Strong pseudoprimes to base 80.at n=27A020306
- Strong pseudoprimes to base 97.at n=33A020323
- Composite numbers k such that k divides F(k-1) where F(j) are the Fibonacci numbers.at n=28A069106
- Numbers k that divide Fibonacci(k-1) but do not divide Fibonacci(k) - 1.at n=14A094410
- Semiprimes k that divide Fibonacci(k-1).at n=18A177086
- Irregular triangle read by rows: T(n,k) is the number of polysticks of size k, i.e., connected subsets of k edges, of the n X n flat torus, up to cyclic shifts and reflections of rows and columns, as well as interchange of rows and columns; 1 <= k <= 2*n^2.at n=38A385390