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, 0, 1), (-1, 1, -1), (1, -1, -1), (1, 0, 0)}.
A148012
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, 0, 1), (-1, 1, -1), (1, -1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =15a(6) =44a(7) =101a(8) =348a(9) =859a(10) =2926a(11) =7765a(12) =28092a(13) =77797a(14) =288226a(15) =835551a(16) =3149704a(17) =9376877a(18) =36183832a(19) =110801091a(20) =431609988a(21) =1350519440a(22) =5338560871a(23) =17003928647a(24) =67861860571a(25) =219953201097a(26) =885178666480
External references
- oeis: A148012