Triangle read by rows: row n lists partitions of n-th triangular number into triangular parts.

Terms

a(0) =1a(1) =3a(2) =111a(3) =6a(4) =33a(5) =3111a(6) =111111a(7) =10a(8) =631a(9) =61111a(10) =3331a(11) =331111a(12) =31111111a(13) =1111111111a(14) =15a(15) =10311a(16) =1011111a(17) =663a(18) =66111a(19) =6333a(20) =633111a(21) =63111111a(22) =6111111111a(23) =33333a(24) =3333111a(25) =333111111a(26) =33111111111a(29) =21a(30) =156