Third column of triangle A060058.

Terms

a(0) =5a(1) =61a(2) =331a(3) =1211a(4) =3486a(5) =8526a(6) =18522a(7) =36762a(8) =67947a(9) =118547a(10) =197197a(11) =315133a(12) =486668a(13) =729708a(14) =1066308a(15) =1523268a(16) =2132769a(17) =2933049a(18) =3969119a(19) =5293519a(20) =6967114a(21) =9059930a(22) =11652030a(23) =14834430a(24) =18710055a(25) =23394735a(26) =29018241a(27) =35725361a(28) =43677016a(29) =53051416