Irregular triangle read by rows: T(n,k) = Sum_{i=0..k} (-1)^i * binomial(6*n+1,i) * binomial(k+6-i,6)^n, 0 <= k <= 6*(n-1).
A237252
Irregular triangle read by rows: T(n,k) = Sum_{i=0..k} (-1)^i * binomial(6*n+1,i) * binomial(k+6-i,6)^n, 0 <= k <= 6*(n-1).
Terms
- a(0) =1a(1) =1a(2) =36a(3) =225a(4) =400a(5) =225a(6) =36a(7) =1a(8) =1a(9) =324a(10) =15606a(11) =233300a(12) =1424925a(13) =4050864a(14) =5703096a(15) =4050864a(16) =1424925a(17) =233300a(18) =15606a(19) =324a(20) =1a(21) =1a(22) =2376a(23) =554931a(24) =35138736a(25) =879018750a(26) =10490842656a(27) =66555527346a(28) =239677178256a(29) =509723668476
External references
- oeis: A237252