Sum of the largest parts in the partitions of 4n into 4 parts with smallest part = 1.

Terms

a(0) =1a(1) =15a(2) =62a(3) =163a(4) =333a(5) =596a(6) =973a(7) =1475a(8) =2130a(9) =2959a(10) =3969a(11) =5192a(12) =6649a(13) =8343a(14) =10310a(15) =12571a(16) =15125a(17) =18012a(18) =21253a(19) =24843a(20) =28826a(21) =33223a(22) =38025a(23) =43280a(24) =49009a(25) =55199a(26) =61902a(27) =69139a(28) =76893a(29) =85220