Number of -n..n arrays of 7 elements with first and second differences also in -n..n.
A201092
Number of -n..n arrays of 7 elements with first and second differences also in -n..n.
Terms
- a(0) =169a(1) =5089a(2) =50391a(3) =286207a(4) =1150785a(5) =3681179a(6) =9975741a(7) =23891417a(8) =51927841a(9) =104482217a(10) =197273691a(11) =353343429a(12) =605118809a(13) =997367601a(14) =1589978367a(15) =2462102871a(16) =3715701055a(17) =5481137105a(18) =7921503361a(19) =11239970929a(20) =15684870457a(21) =21559136673
External references
- oeis: A201092