33720

Appears in sequences

• a(n) = round(n*phi^14), where phi is the golden ratio, A001622.at n=40A004949
• Reversion of Pell numbers A000129(n+1).at n=13A104565
• Binomial transform of A109747.at n=14A153732
• Number of 4-step self-avoiding walks on an n X n square summed over all starting positions.at n=31A188149
• Values of the difference d for 6 primes in geometric-arithmetic progression with the minimal sequence {7*7^j + j*d}, j = 0 to 5.at n=17A209205
• a(n) = n*(1 + n)*(3 - 4*n + 4*n^2)/6.at n=14A213840
• Coefficients of formal series in powers of (tan(x))^2 for tan(5*x)/tan(x).at n=4A220673
• Number of (n+1) X (1+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=2A234185
• Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=0A234187
• T(n,k) is the number of (n+1) X (k+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=3A234190
• T(n,k) is the number of (n+1) X (k+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=5A234190
• G.f.: sqrt( (1 + sqrt(1+8*x)) / (1 + sqrt(1-8*x)) ).at n=7A246062
• Trajectory of 270 under repeated application of k -> (phi(k)+sigma(k))/2.at n=18A291789
• Numbers t which satisfy the equation: t mod k = floor((t - k)/k) mod k (1 <= k <= t) only for k = 1 and t.at n=32A375007
• a(n) = Sum_{k=0..floor(n/3)} binomial(k+3,3) * binomial(k,n-3*k)^2.at n=21A377150