Column 4 of array in A133713.

Terms

a(0) =1a(1) =22a(2) =226a(3) =1371a(4) =5901a(5) =20097a(6) =57813a(7) =146427a(8) =335742a(9) =710677a(10) =1408693a(11) =2643004a(12) =4732728a(13) =8141238a(14) =13524078a(15) =21787914a(16) =34162095a(17) =52284504a(18) =78303484a(19) =114997729a(20) =165916135a(21) =235539711a(22) =329467755a(23) =454630605a(24) =619531380a(25) =834519231