a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, with initial values 1,1,1,1.
A025268
a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, with initial values 1,1,1,1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =11a(6) =32a(7) =95a(8) =284a(9) =860a(10) =2630a(11) =8115a(12) =25242a(13) =79080a(14) =249342a(15) =790719a(16) =2520546a(17) =8072216a(18) =25961150a(19) =83814536a(20) =271538192a(21) =882527618a(22) =2876712308a(23) =9402284815a(24) =30806948110a(25) =101172278362a(26) =332965892290
External references
- oeis: A025268