Number of 7's in all partitions of n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1a(7) =1a(8) =2a(9) =3a(10) =5a(11) =7a(12) =11a(13) =16a(14) =23a(15) =32a(16) =45a(17) =61a(18) =84a(19) =112a(20) =151a(21) =199a(22) =263a(23) =342a(24) =446a(25) =574a(26) =739a(27) =943a(28) =1201a(29) =1518