Sum of the smallest parts of the partitions of 4n into 4 parts.

Terms

a(0) =1a(1) =6a(2) =21a(3) =55a(4) =119a(5) =227a(6) =396a(7) =645a(8) =996a(9) =1474a(10) =2106a(11) =2922a(12) =3955a(13) =5240a(14) =6815a(15) =8721a(16) =11001a(17) =13701a(18) =16870a(19) =20559a(20) =24822a(21) =29716a(22) =35300a(23) =41636a(24) =48789a(25) =56826a(26) =65817a(27) =75835a(28) =86955a(29) =99255