Number of second differences of arrays of length n+2 of numbers in 0..5.
A228215
Number of second differences of arrays of length n+2 of numbers in 0..5.
Terms
- a(0) =21a(1) =271a(2) =2731a(3) =23351a(4) =176851a(5) =1225631a(6) =8006491a(7) =50556551a(8) =313882531a(9) =1932641711a(10) =11839990891a(11) =72260648471a(12) =439667406451
External references
- oeis: A228215