340418

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 50.at n=18A031638
• Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,1) and new values introduced in order 0..2.at n=11A275396
• Row 4 of A328464: a(n) = A276156(16n - 8) / 30.at n=26A328467