Triangle of numbers arising in enumeration of walks on cubic lattice.

Terms

a(0) =1a(1) =4a(2) =1a(3) =17a(4) =8a(5) =1a(6) =76a(7) =50a(8) =12a(9) =1a(10) =354a(11) =288a(12) =99a(13) =16a(14) =1a(15) =1704a(16) =1605a(17) =700a(18) =164a(19) =20a(20) =1a(21) =8421a(22) =8824a(23) =4569a(24) =1376a(25) =245a(26) =24a(27) =1a(28) =42508a(29) =48286