Number of subsets of the first n nonzero triangular numbers whose sum is a nonzero triangular number.

A377123

Number of subsets of the first n nonzero triangular numbers whose sum is a nonzero triangular number.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =5a(4) =8a(5) =13a(6) =18a(7) =29a(8) =48a(9) =81a(10) =136a(11) =228a(12) =420a(13) =747a(14) =1326a(15) =2468a(16) =4520a(17) =8296a(18) =15232a(19) =28196a(20) =52504a(21) =96936a(22) =181699a(23) =340998a(24) =640091a(25) =1207386a(26) =2282956a(27) =4328536a(28) =8211989a(29) =15623003

External references