Form a conjugate partition of row with 1+1+1 in first row. all other rows are the union of their parents. a(n) = number of types of piles in the n-th row.
A064480
Form a conjugate partition of row with 1+1+1 in first row. all other rows are the union of their parents. a(n) = number of types of piles in the n-th row.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =10a(6) =13a(7) =19a(8) =26a(9) =36a(10) =51a(11) =69a(12) =94a(13) =130a(14) =188a(15) =261a(16) =366a(17) =514a(18) =710a(19) =993a(20) =1399a(21) =1995a(22) =2779a(23) =3912a(24) =5490a(25) =7723a(26) =10848a(27) =15230a(28) =21457a(29) =30165
External references
- oeis: A064480