Sum of numbers in the n-th antidiagonal of the reciprocity array of 1.

Terms

a(0) =1a(1) =2a(2) =6a(3) =13a(4) =26a(5) =44a(6) =72a(7) =108a(8) =156a(9) =215a(10) =290a(11) =381a(12) =486a(13) =610a(14) =758a(15) =924a(16) =1112a(17) =1329a(18) =1566a(19) =1839a(20) =2134a(21) =2456a(22) =2816a(23) =3220a(24) =3640a(25) =4099a(26) =4608a(27) =5153a(28) =5726a(29) =6368