(n-1)-st elementary symmetric function of the first n terms of (2,3,1,2,3,1,2,3,1,...)=A010882.

Terms

a(0) =1a(1) =5a(2) =11a(3) =28a(4) =96a(5) =132a(6) =300a(7) =972a(8) =1188a(9) =2592a(10) =8208a(11) =9504a(12) =20304a(13) =63504a(14) =71280a(15) =150336a(16) =466560a(17) =513216a(18) =1073088a(19) =3312576a(20) =3592512a(21) =7464960a(22) =22954752a(23) =24634368a(24) =50948352a(25) =156204288a(26) =166281984a(27) =342641664a(28) =1048080384a(29) =1108546560