Number of ways to split 1, 2, 3, ..., 5n into n arithmetic progressions each with 5 terms.
A104431
Number of ways to split 1, 2, 3, ..., 5n into n arithmetic progressions each with 5 terms.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =21a(6) =59a(7) =125a(8) =349a(9) =848a(10) =2224a(11) =5210a(12) =15720a(13) =37096a(14) =98241a(15) =245251a(16) =684475a(17) =1703174a(18) =4915084a(19) =12024901a(20) =33594399
External references
- oeis: A104431