Coefficient of x in the reduction (by x^2->x+1) of polynomial p(n,x) identified in Comments.

A192349

Coefficient of x in the reduction (by x^2->x+1) of polynomial p(n,x) identified in Comments.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =14a(4) =40a(5) =180a(6) =616a(7) =2456a(8) =8960a(9) =34384a(10) =128160a(11) =485728a(12) =1823360a(13) =6882368a(14) =25896064a(15) =97614720a(16) =367575040a(17) =1384954112a(18) =5216465408a(19) =19651804672a(20) =74025216000a(21) =278859191296

External references