118979

Appears in sequences

• Spiro-tetranacci numbers: a(n) = sum of four previous terms that are nearest when terms arranged in a spiral.at n=30A092369
• a(n) = 225*n^2 - 2*n.at n=22A158226
• Numbers k such that k and k+1 are both terms in A377732.at n=37A377733
• Irregular triangle read by rows: T(n,k) is the number of free polyaboloes (or polytans) with n cells of which 2*k share a hypotenuse in pairs (making up k squares), 0 <= k <= n/2.at n=51A391191