Number of 8 X 8 Franklin squares with magic sum 2n.

Terms

a(0) =1a(1) =0a(2) =34a(3) =64a(4) =483a(5) =1152a(6) =4228a(7) =9792a(8) =25957a(9) =54848a(10) =120934a(11) =233664a(12) =455751a(13) =816832a(14) =1458184a(15) =2456192a(16) =4100169a(17) =6560960a(18) =10388394a(19) =15928576a(20) =24163115a(21) =35742464a(22) =52332172a(23) =75080960a(24) =106697901a(25) =149112576a(26) =206572782a(27) =282188608a(28) =382414991