Sum of the fourth largest parts in the partitions of n into 7 parts.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =1a(9) =2a(10) =3a(11) =6a(12) =9a(13) =15a(14) =22a(15) =33a(16) =46a(17) =67a(18) =91a(19) =128a(20) =169a(21) =228a(22) =297a(23) =390a(24) =498a(25) =641a(26) =806a(27) =1018a(28) =1263a(29) =1569