Number of nondecreasing arrays of n 1..n integers with the sum of their 3rd powers equal to sum(i^3,i=1..n).
A216641
Number of nondecreasing arrays of n 1..n integers with the sum of their 3rd powers equal to sum(i^3,i=1..n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =2a(7) =6a(8) =12a(9) =30a(10) =76a(11) =224a(12) =597a(13) =1801a(14) =5469a(15) =16958a(16) =53308a(17) =169872a(18) =548344a(19) =1791949a(20) =5915441a(21) =19700851a(22) =66148464a(23) =223751776a(24) =761919971a(25) =2610778118a(26) =8998428171a(27) =31179152130a(28) =108577507149a(29) =379879051198
External references
- oeis: A216641