Eigentriangle of A055461 (square subsequences decrescendo).

Terms

a(0) =1a(1) =4a(2) =1a(3) =9a(4) =4a(5) =5a(6) =16a(7) =9a(8) =20a(9) =18a(10) =25a(11) =16a(12) =45a(13) =72a(14) =63a(15) =36a(16) =25a(17) =80a(18) =162a(19) =252a(20) =221a(21) =49a(22) =36a(23) =125a(24) =288a(25) =567a(26) =884a(27) =776a(28) =64a(29) =49