Sum of n-th antidiagonal of array in A082002.

Terms

a(0) =1a(1) =5a(2) =22a(3) =45a(4) =99a(5) =181a(6) =260a(7) =441a(8) =535a(9) =824a(10) =1063a(11) =1437a(12) =1962a(13) =2325a(14) =3114a(15) =3545a(16) =4052a(17) =5063a(18) =6554a(19) =7247a(20) =8734a(21) =9706a(22) =11270a(23) =12875a(24) =16101a(25) =16930a(26) =20137a(27) =20958a(28) =24068a(29) =27492