19298
domain: N
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 11.at n=20A031599
- Beach-Williams Pell numbers of type 2p (p prime).at n=16A212074
- Number of (w,x,y,z) with all terms in {0,...,n} and |w-x|+|x-y+|y-z|=n.at n=27A212904
- Numbers n such that n^9+9 and n^9-9 are prime.at n=16A239505
- Floor of area of triangle whose sides are consecutive Ulam numbers (A002858).at n=41A330909
- Irregular table read by rows, T(n, k) is the rank of the k-th Seidel permutation of {1,...,n}, permutations sorted in lexicographical order.at n=36A347600
- Indices k where k/A109812(k) reaches a new high point.at n=9A352919