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, 1), (-1, 1, 0), (0, 0, -1), (1, 0, 0)}.
A148015
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, 1), (-1, 1, 0), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =46a(7) =110a(8) =335a(9) =932a(10) =2810a(11) =7952a(12) =24816a(13) =77649a(14) =246474a(15) =775403a(16) =2494697a(17) =8205868a(18) =27285758a(19) =89808549a(20) =299916394a(21) =1015055715a(22) =3470516713a(23) =11875011937a(24) =40535085083a(25) =140299654185a(26) =489869705096
External references
- oeis: A148015