A367655
G.f. A(x) satisfies A(x) = 1 / (1 - x - x * (1 + x) * A(x^2)).
Original entry on oeis.org
1, 2, 5, 14, 39, 111, 314, 894, 2539, 7224, 20536, 58413, 166102, 472410, 1343448, 3820748, 10865805, 30901790, 87882171, 249931270, 710786078, 2021427153, 5748794540, 16349171957, 46495891170, 132231060820, 376055838670, 1069476434880, 3041515866674
Offset: 0
-
a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=v[i]+sum(j=0, i-1, v[j\2+1]*v[i-j])); v;
A367656
G.f. A(x) satisfies A(x) = 1 / (1 - x - x * (1 + x + x^2) * A(x^3)).
Original entry on oeis.org
1, 2, 5, 13, 35, 94, 252, 678, 1823, 4900, 13176, 35427, 95250, 256105, 688599, 1851450, 4978062, 13384681, 35987808, 96761612, 260166110, 699517054, 1880814358, 5057006914, 13596939262, 36558534049, 98296122593, 264291989596, 710610490247, 1910641595588
Offset: 0
-
a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=v[i]+sum(j=0, i-1, v[j\3+1]*v[i-j])); v;
A367657
G.f. A(x) satisfies A(x) = 1 / (1 - x - x * (1 + x + x^2 + x^3) * A(x^4)).
Original entry on oeis.org
1, 2, 5, 13, 34, 90, 238, 629, 1662, 4394, 11616, 30707, 81173, 214584, 567259, 1499563, 3964128, 10479273, 27702219, 73231500, 193589270, 511758023, 1352844978, 3576279113, 9453982143, 24991835308, 66066533905, 174648514118, 461687660561, 1220482733670
Offset: 0
-
a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=v[i]+sum(j=0, i-1, v[j\4+1]*v[i-j])); v;
Showing 1-3 of 3 results.