(n-1)-st elementary symmetric function of the first n terms of (1,2,3,4,5,1,2,3,4,5,...)=A010884.

A203166

(n-1)-st elementary symmetric function of the first n terms of (1,2,3,4,5,1,2,3,4,5,...)=A010884.

Terms

    a(0) =1a(1) =3a(2) =11a(3) =50a(4) =274a(5) =394a(6) =908a(7) =2964a(8) =12576a(9) =65760a(10) =80160a(11) =174720a(12) =552960a(13) =2298240a(14) =11836800a(15) =13564800a(16) =28857600a(17) =90028800a(18) =370483200a(19) =1893888000a(20) =2101248000a(21) =4409856000a(22) =13644288000a(23) =55821312000a(24) =284083200000a(25) =308966400000

External references