Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum.
A212531
Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =10a(4) =21a(5) =40a(6) =83a(7) =161a(8) =331a(9) =644a(10) =1102a(11) =3627a(12) =5646a(13) =10083a(14) =29188a(15) =53681a(16) =84121a(17) =237453a(18) =373114a(19) =1400757a(20) =2443494
External references
- oeis: A212531