0-sequence of reduction of triangular number sequence by x^2 -> x+1.

Terms

a(0) =1a(1) =1a(2) =7a(3) =17a(4) =47a(5) =110a(6) =250a(7) =538a(8) =1123a(9) =2278a(10) =4522a(11) =8812a(12) =16911a(13) =32031a(14) =59991a(15) =111263a(16) =204593a(17) =373370a(18) =676800a(19) =1219440a(20) =2185251a(21) =3896796a(22) =6917892a(23) =12231192a(24) =21544717a(25) =37819885a(26) =66179335a(27) =115464893a(28) =200906723a(29) =348688838