Program to find Nth term of series 2 , 12 , 28 , 50 , 77 , 112 , 152 , 198 , ... . . | calculate Nth term of series ; Driver code
< ? php function nthTerm ( $ n ) { return 3 * pow ( $ n , 2 ) + $ n - 2 ; } $ N = 4 ; echo nthTerm ( $ N ) ; ? >