a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027948.

A027959

a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027948.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =12a(7) =16a(8) =27a(9) =37a(10) =59a(11) =85a(12) =129a(13) =192a(14) =285a(15) =428a(16) =634a(17) =949a(18) =1412a(19) =2104a(20) =3140a(21) =4671a(22) =6973a(23) =10378a(24) =15478a(25) =23058a(26) =34362a(27) =51216a(28) =76305a(29) =113736

External references