123228
domain: N
Appears in sequences
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 26.at n=26A031704
- a(n) = 729*n^2 + 27.at n=13A158645
- a(n) = 169*n^2 + n.at n=26A173275
- Number of 2 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.at n=12A221756
- First differences of A275315.at n=21A275066
- First differences of A275316.at n=21A275472
- a(n) = binomial(n, 2) + 6*binomial(n, 4).at n=28A327319