A385979
a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+2,2) * binomial(n-1,k) * a(k) * a(n-1-k).
Original entry on oeis.org
1, 1, 7, 145, 6449, 522096, 69506737, 14186121706, 4212887224905, 1747635451186240, 979909591959562571, 722787600597422326704, 685585597413868516073953, 820283211774547803576454720, 1217648676024408903145299884925, 2210504358495882876855897821031376
Offset: 0
-
a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=sum(j=0, i-1, (j+1)*binomial(j+2, 2)*binomial(i-1, j)*v[j+1]*v[i-j])); v;
A385980
a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+3,3) * binomial(n-1,k) * a(k) * a(n-1-k).
Original entry on oeis.org
1, 1, 9, 295, 24921, 4504516, 1543745107, 919392117722, 890353538984905, 1330464112593541120, 2940642877993896450701, 9284167814032856189142864, 40666099850492306669400356041, 241073945237343019120798232332320, 1893421587381601800604423881821405775
Offset: 0
-
a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=sum(j=0, i-1, (j+1)*binomial(j+3, 3)*binomial(i-1, j)*v[j+1]*v[i-j])); v;
A385982
a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+5,5) * binomial(n-1,k) * a(k) * a(n-1-k).
Original entry on oeis.org
1, 1, 13, 856, 195525, 124248221, 188647130983, 611439299390984, 3879035706651051809, 44966039381652540837592, 900671755790709615794856671, 29761825253146859538914816137428, 1560353636451919718380582807368070417, 125541398272463750591414559674298911706684
Offset: 0
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a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=sum(j=0, i-1, (j+1)*binomial(j+5, 5)*binomial(i-1, j)*v[j+1]*v[i-j])); v;
Showing 1-3 of 3 results.