Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 1, -1), (-1, 1, 0), (1, 0, 1)}.
A148554
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 1, -1), (-1, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =23a(5) =49a(6) =203a(7) =461a(8) =2191a(9) =5417a(10) =24179a(11) =61093a(12) =294551a(13) =778881a(14) =3591867a(15) =9589629a(16) =46607903a(17) =128126041a(18) =601709315a(19) =1661832149a(20) =8118460327a(21) =22893192881a(22) =108762301515a(23) =307387152813
External references
- oeis: A148554