Define two triangular arrays by: B(0,0)=C(0,0)=1, B(0,r)=C(0,r)=0 for r>0, C(t,-1)=C(t,0); and for t,r >= 0, B(t+1,r)=C(t,r-1)+2C(t,r)-B(t,r), C(t+1,r)=B(t+1,r)+2B(t+1,r+1)-C(t,r). Sequence gives array B(t,r) read by rows.
A177011
Define two triangular arrays by: B(0,0)=C(0,0)=1, B(0,r)=C(0,r)=0 for r>0, C(t,-1)=C(t,0); and for t,r >= 0, B(t+1,r)=C(t,r-1)+2C(t,r)-B(t,r), C(t+1,r)=B(t+1,r)+2B(t+1,r+1)-C(t,r). Sequence gives array B(t,r) read by rows.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =7a(4) =4a(5) =1a(6) =29a(7) =18a(8) =6a(9) =1a(10) =130a(11) =85a(12) =33a(13) =8a(14) =1a(15) =611a(16) =414a(17) =177a(18) =52a(19) =10a(20) =1a(21) =2965a(22) =2062a(23) =943a(24) =313a(25) =75a(26) =12a(27) =1a(28) =14726a(29) =10447
External references
- oeis: A177011