a(n) is the smallest number which has a water-capacity of n.

Terms

a(0) =60a(1) =120a(2) =440a(3) =168a(4) =264a(5) =840a(6) =2448a(7) =528a(8) =1904a(9) =624a(10) =1360a(11) =2295a(12) =816a(13) =1632a(14) =20128a(15) =1824a(16) =48300a(17) =3105a(18) =15392a(19) =2208a(20) =13024a(21) =2400a(22) =10656a(23) =4080a(24) =8288a(25) =2784a(26) =5920a(27) =2976a(28) =3552a(29) =9120