Number of -7..7 arrays of n elements with first and second differences also in -7..7.
A201087
Number of -7..7 arrays of n elements with first and second differences also in -7..7.
Terms
- a(0) =15a(1) =169a(2) =1483a(3) =13405a(4) =121371a(5) =1100401a(6) =9975741a(7) =90429601a(8) =819732439a(9) =7430807385a(10) =67359774511a(11) =610611788991
External references
- oeis: A201087