131836

Appears in sequences

• a(1)=1, a(n) = n*5^(n-1) + a(n-1).at n=6A014917
• a(n) = Sum_{k=0..n} C(n-k, floor(k/2))*3^k.at n=13A097335
• Triangle read by rows, generated from (..., 3, 2, 1).at n=61A108283
• a(n) = 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5 + 7*n^6.at n=5A113532
• a(0)=0, a(1)=1, a(n) = min{5 a(k) + (5^(n-k)-1)/4, k=0..(n-1)} for n>=2.at n=28A259669
• a(1)=1, a(n+1) = a(n) + p, where p is the largest prime < a(n) if a(n) is even and the smallest prime > a(n) if a(n) is odd.at n=16A277224