30260

Appears in sequences

• a(0) = 1, a(n) = 18*n^2 + 2 for n>0.at n=41A010008
• a(n) = sum of the squares of the coefficients of x^n in x^(n-2k)*A(x^2)^(n-2k), as k varies from 0 to floor(n/2), with a(0)=1.at n=13A095892
• Number of ways to write n as an ordered sum of 1s, 2s, 3s and 4s such that no 2 precedes any 1 and no 3 precedes any 1 or 2.at n=27A123569
• a(n) = a(n-1)*a(n-3) - a(n-2)^2, with a(1) = 1, a(2) = 2, a(3) = 3.at n=9A142714
• Partial sums of A002106.at n=25A173407
• Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|>|x-y|+|y-z|.at n=20A212573
• Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal.at n=5A233726
• Number of (n+1)X(6+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal.at n=0A233731
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal.at n=15A233733
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal.at n=20A233733
• a(n) is the Wiener index of the Lucas cube L_n.at n=9A238420
• Practical numbers z such that z^2 = x^2 + y^2 for some practical numbers x and y with gcd(x,y,z) = 4.at n=40A294112
• G.f. = Phi*F^5, where Phi = g.f. for A028930, F = g.f. for A028959.at n=15A328536