Number of ways to write 2*n as an ordered sum of n nonzero triangular numbers.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =6a(5) =5a(6) =20a(7) =42a(8) =70a(9) =261a(10) =297a(11) =1430a(12) =1584a(13) =7293a(14) =9634a(15) =35945a(16) =60150a(17) =176596a(18) =366401a(19) =886977a(20) =2150421a(21) =4624410a(22) =12205074a(23) =25065216a(24) =67616872a(25) =139894305a(26) =369551925a(27) =793214982a(28) =2011977414a(29) =4517758504