Right diagonal of triangle in A072467.

Terms

a(0) =2a(1) =3a(2) =7a(3) =29a(4) =61a(5) =157a(6) =239a(7) =521a(8) =739a(9) =1021a(10) =1277a(11) =2221a(12) =2731a(13) =3851a(14) =4651a(15) =5857a(16) =7039a(17) =9343a(18) =10831a(19) =14561a(20) =15919a(21) =18481a(22) =20563a(23) =25321a(24) =27551a(25) =32371a(26) =35803a(27) =40993a(28) =44371a(29) =53551