A triangular sequence recursion: A(n,k)=A(n - 1, k - 1) + A(n - 1, k) + (5 (-2 + n) (-7 + 5 n))*A(n - 2, k - 1).
A153879
A triangular sequence recursion: A(n,k)=A(n - 1, k - 1) + A(n - 1, k) + (5 (-2 + n) (-7 + 5 n))*A(n - 2, k - 1).
Terms
- a(0) =2a(1) =5a(2) =5a(3) =2a(4) =96a(5) =2a(6) =2a(7) =748a(8) =748a(9) =2a(10) =2a(11) =1290a(12) =27416a(13) =1290a(14) =2a(15) =2a(16) =2212a(17) =372786a(18) =372786a(19) =2212a(20) =2a(21) =2a(22) =3614a(23) =1277998a(24) =19936772a(25) =1277998a(26) =3614a(27) =2a(28) =2a(29) =5596
External references
- oeis: A153879