Number of triangular partitions of n of order 4.

Terms

a(0) =1a(1) =4a(2) =10a(3) =23a(4) =47a(5) =88a(6) =158a(7) =270a(8) =443a(9) =706a(10) =1094a(11) =1654a(12) =2450a(13) =3561a(14) =5087a(15) =7159a(16) =9936a(17) =13613a(18) =18437a(19) =24702a(20) =32764a(21) =43060a(22) =56103a(23) =72505a(24) =92999a(25) =118439a(26) =149828a(27) =188346a(28) =235356a(29) =292437