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

A146772

Triangle read by rows: expansion of p(x,n)=If[n == 0, 1, (x + 1)^n + 2^(n-1)*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) =6a(5) =1a(6) =1a(7) =11a(8) =11a(9) =1a(10) =1a(11) =28a(12) =22a(13) =28a(14) =1a(15) =1a(16) =69a(17) =58a(18) =58a(19) =69a(20) =1a(21) =1a(22) =166a(23) =207a(24) =84a(25) =207a(26) =166a(27) =1a(28) =1a(29) =391

External references