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, 0), (-1, 1, -1), (1, -1, -1), (1, 1, -1), (1, 1, 1)}.
A149517
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, 0), (-1, 1, -1), (1, -1, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =49a(5) =157a(6) =641a(7) =2331a(8) =9585a(9) =36487a(10) =151583a(11) =597509a(12) =2494057a(13) =10045479a(14) =42202239a(15) =172472323a(16) =728178749a(17) =3010545403a(18) =12761047343a(19) =53214792303a(20) =226385003307a(21) =950572179633
External references
- oeis: A149517