Number of -5..5 arrays of n elements with first, second and third differences also in -5..5.
A202121
Number of -5..5 arrays of n elements with first, second and third differences also in -5..5.
Terms
- a(0) =11a(1) =91a(2) =587a(3) =2833a(4) =14063a(5) =69573a(6) =345241a(7) =1713419a(8) =8503671a(9) =42203951a(10) =209464959a(11) =1039605903a(12) =5159703889a(13) =25608300207a(14) =127097485317a(15) =630802143547
External references
- oeis: A202121