Triangle T(n,k), 0<=k<=n, defined by T(n,k) = 0 if k<0 or k>n, T(0,0) = 1, T(n,k) = T(n,k-1)+T(n-1,k-1)+T(n-1,k)+T(n-1,k+1).

A122479

Triangle T(n,k), 0<=k<=n, defined by T(n,k) = 0 if k<0 or k>n, T(0,0) = 1, T(n,k) = T(n,k-1)+T(n-1,k-1)+T(n-1,k)+T(n-1,k+1).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =8a(6) =9a(7) =26a(8) =40a(9) =48a(10) =35a(11) =110a(12) =224a(13) =312a(14) =360a(15) =145a(16) =514a(17) =1160a(18) =2056a(19) =2728a(20) =3088a(21) =659a(22) =2478a(23) =5208a(24) =12152a(25) =20024a(26) =25840a(27) =28928a(28) =3137a(29) =12482

External references