Triangle read by rows: expansion of p(x,n)=If[n == 0, 1, (x + 1)^n + 2^(n-2)*Sum[Binomial[n-m, m]*x^m*(1 + x^(n - 2*m)), {m, 1, n - 1}]].

A146771

Triangle read by rows: expansion of p(x,n)=If[n == 0, 1, (x + 1)^n + 2^(n-2)*Sum[Binomial[n-m, m]*x^m*(1 + x^(n - 2*m)), {m, 1, n - 1}]].

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =7a(8) =7a(9) =1a(10) =1a(11) =16a(12) =14a(13) =16a(14) =1a(15) =1a(16) =37a(17) =34a(18) =34a(19) =37a(20) =1a(21) =1a(22) =86a(23) =111a(24) =52a(25) =111a(26) =86a(27) =1a(28) =1a(29) =199

External references