18748
domain: N
Appears in sequences
- Numbers having four 4's in base 8.at n=25A043440
- Number of palindromes (in base 5) below 5^n.at n=10A117864
- Number of clusters with n vertices, n-1 edges and zero contacts on the simple cubic lattice.at n=6A118356
- Even numbers k such that if a person is born in year k and lives not more than 100 years, then he never celebrates his prime birthday on a prime year.at n=17A124658
- Partial sums of floor(Fibonacci(n)/4).at n=23A179006
- Numbers n, not divisible by 3, 5, 7 or 11, such that A000203(n)-n-1 and 2*n+1-A000203(n) are prime numbers.at n=7A180268
- Base-5 Keith numbers.at n=21A187713
- Number of 2 X n binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.at n=9A269076
- Ordered perimeters p of primitive Pythagorean triangles no side of which is squarefree.at n=33A329392
- Number of integer partitions of n whose distinct parts have integer mean.at n=45A360241