a(n) = floor((product of first n triangular numbers)/(sum of first n factorials)).
A090902
a(n) = floor((product of first n triangular numbers)/(sum of first n factorials)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =64a(6) =268a(7) =1236a(8) =6286a(9) =35031a(10) =212401a(11) =1392489a(12) =9817398a(13) =74078419a(14) =595722994a(15) =5086611025a(16) =45961503660a(17) =438168680119
External references
- oeis: A090902