Square array A read by antidiagonals: the columns are given by A(n,1)=1, A(n,2)=n+1, A(n,3) = n^2+2n+3, A(n,4) = n^3+3*n^2+6*n+4, A(n,5) = n^4+4*n^3+10*n^2+12*n+7, ..., whose coefficients are given by A104509 (see also A118981).
A309220
Square array A read by antidiagonals: the columns are given by A(n,1)=1, A(n,2)=n+1, A(n,3) = n^2+2n+3, A(n,4) = n^3+3*n^2+6*n+4, A(n,5) = n^4+4*n^3+10*n^2+12*n+7, ..., whose coefficients are given by A104509 (see also A118981).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =6a(6) =1a(7) =4a(8) =11a(9) =14a(10) =1a(11) =5a(12) =18a(13) =36a(14) =34a(15) =1a(16) =6a(17) =27a(18) =76a(19) =119a(20) =82a(21) =1a(22) =7a(23) =38a(24) =140a(25) =322a(26) =393a(27) =198a(28) =1a(29) =8
External references
- oeis: A309220