Number of arrays of 4 integers in -n..n with sum zero and adjacent elements differing in absolute value.

A202964

Number of arrays of 4 integers in -n..n with sum zero and adjacent elements differing in absolute value.

Terms

    a(0) =4a(1) =28a(2) =108a(3) =268a(4) =544a(5) =972a(6) =1576a(7) =2392a(8) =3456a(9) =4792a(10) =6436a(11) =8424a(12) =10780a(13) =13540a(14) =16740a(15) =20404a(16) =24568a(17) =29268a(18) =34528a(19) =40384a(20) =46872a(21) =54016a(22) =61852a(23) =70416a(24) =79732a(25) =89836a(26) =100764a(27) =112540a(28) =125200a(29) =138780

External references