Number of -n..n arrays of 6 elements with first through fourth differences also in -n..n.
A202666
Number of -n..n arrays of 6 elements with first through fourth differences also in -n..n.
Terms
- a(0) =23a(1) =363a(2) =2591a(3) =11413a(4) =37505a(5) =101567a(6) =238453a(7) =503849a(8) =979919a(9) =1783797a(10) =3075089a(11) =5067465a(12) =8035301a(13) =12330321a(14) =18389067a(15) =26749755a(16) =38062317a(17) =53112803a(18) =72823295a(19) =98289495a(20) =130780551a(21) =171770127a(22) =222946517a(23) =286251779a(24) =363870209a(25) =458294877
External references
- oeis: A202666