Number of length 2+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero.

A250321

Number of length 2+2 0..n arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero.

Terms

    a(0) =8a(1) =25a(2) =60a(3) =117a(4) =200a(5) =321a(6) =480a(7) =681a(8) =940a(9) =1253a(10) =1624a(11) =2073a(12) =2592a(13) =3185a(14) =3876a(15) =4653a(16) =5520a(17) =6505a(18) =7592a(19) =8785a(20) =10116a(21) =11565a(22) =13136a(23) =14865a(24) =16728a(25) =18729a(26) =20908a(27) =23237a(28) =25720a(29) =28401

External references