A triangular array distributing the values of sequence A072213 (cf. A115994).

Terms

a(0) =1a(1) =4a(2) =1a(3) =9a(4) =20a(5) =1a(6) =16a(7) =140a(8) =74a(9) =1a(10) =25a(11) =572a(12) =1136a(13) =224a(14) =1a(15) =36a(16) =1785a(17) =8866a(18) =6685a(19) =604a(20) =1a(21) =49a(22) =4600a(23) =47152a(24) =88380a(25) =31851a(26) =1492a(27) =1a(28) =64a(29) =10416