First term of n-th difference sequence of (round(k*sqrt(2))), k >= 0.

Terms

a(0) =1a(1) =1a(2) =-2a(3) =4a(4) =-8a(5) =15a(6) =-25a(7) =35a(8) =-35a(9) =0a(10) =126a(11) =-462a(12) =1253a(13) =-2989a(14) =6615a(15) =-13867a(16) =27734a(17) =-52921a(18) =95863a(19) =-163115a(20) =255493a(21) =-352716a(22) =379050a(23) =-134596a(24) =-828875a(25) =3407821a(26) =-9217717a(27) =20837509a(28) =-41675018a(29) =74480265