Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero second differences.

A200556

Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero second differences.

Terms

    a(0) =72a(1) =1240a(2) =7254a(3) =26850a(4) =75792a(5) =178834a(6) =372150a(7) =705270a(8) =1242888a(9) =2067650a(10) =3281874a(11) =5009232a(12) =7397868a(13) =10621792a(14) =14882672a(15) =20413220a(16) =27478160a(17) =36376230a(18) =47443518a(19) =61054528a(20) =77624122a(21) =97610834a(22) =121518006a(23) =149895400a(24) =183343046a(25) =222512226

External references