equation icon  1 1 integral n ( x2) V0(n) = --- V~ --- exp - --- dx, (112) 2 2p 0( ) 2 2--c--- 1- 2 V1(n) = 3 V~ ---exp - 2 n , (113) 22p ( ) 2- V~ c-- 1-2 V2(n) = 3 2pn exp - 2n , (114) 3 ( ) V3(n) = V~ c--(n2- 1)exp - 1n2 , (115) 2p 2