Triangle, read by rows, T(n,k,q) = c(k,q) + c(n-k,q) - c(n, q) where c(n,q) = Product_{j=1..n-1} ((q^(j+1) - 1)/(q-1)) and q = 3.
A172092
Triangle, read by rows, T(n,k,q) = c(k,q) + c(n-k,q) - c(n, q) where c(n,q) = Product_{j=1..n-1} ((q^(j+1) - 1)/(q-1)) and q = 3.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-2a(5) =1a(6) =1a(7) =-47a(8) =-47a(9) =1a(10) =1a(11) =-2027a(12) =-2072a(13) =-2027a(14) =1a(15) =1a(16) =-249599a(17) =-251624a(18) =-251624a(19) =-249599a(20) =1a(21) =1a(22) =-91359839a(23) =-91609436a(24) =-91611416a(25) =-91609436a(26) =-91359839a(27) =1a(28) =1a(29) =-100039779839
External references
- oeis: A172092