First term of n-th difference sequence of (floor(k*r)), r = sqrt(2/3), k >= 0.

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =-1a(5) =0a(6) =5a(7) =-20a(8) =55a(9) =-125a(10) =250a(11) =-450a(12) =725a(13) =-1000a(14) =1000a(15) =1a(16) =-3642a(17) =13278a(18) =-35344a(19) =81720a(20) =-174098a(21) =352716a(22) =-694904a(23) =1355322a(24) =-2652200a(25) =5245956a(26) =-10491911a(27) =21097440a(28) =-42262518a(29) =83482620