Sequence is {a(5,n)}, where a(m,n) is defined at sequence A110665.

Terms

a(0) =0a(1) =1a(2) =5a(3) =12a(4) =16a(5) =5a(6) =-33a(7) =-103a(8) =-203a(9) =-333a(10) =-505a(11) =-743a(12) =-1071a(13) =-1500a(14) =-2028a(15) =-2655a(16) =-3399a(17) =-4296a(18) =-5382a(19) =-6674a(20) =-8170a(21) =-9870a(22) =-11798a(23) =-14002a(24) =-16530a(25) =-19405a(26) =-22625a(27) =-26190a(28) =-30130a(29) =-34505