Number of strict rectangular plane partitions of n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =5a(6) =7a(7) =9a(8) =11a(9) =15a(10) =21a(11) =25a(12) =33a(13) =41a(14) =53a(15) =65a(16) =81a(17) =97a(18) =121a(19) =143a(20) =173a(21) =215a(22) =255a(23) =305a(24) =367a(25) =441a(26) =527a(27) =637a(28) =751a(29) =899