21813
domain: N
Appears in sequences
- Number of Barlow packings with group P3(bar)m1(SO) that repeat after 2n-1 layers.at n=16A011950
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 98.at n=37A031596
- Number of partitions of 5n such that cn(1,5) = cn(4,5) <= cn(0,5) <= cn(2,5) = cn(3,5).at n=12A036881
- Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-1,0,1,2}.at n=43A079982
- Coefficients of the C-Rogers mod 14 identity.at n=46A105782
- Numbers n such that 11n is a partition number.at n=23A225323
- Smallest k>1 such that 10*k^(5*2^n)+1 is prime.at n=6A381793