A066704 Triangle with a(n,k) = C(n,floor(n/k)) with n>=k>=1.

1, 1, 2, 1, 3, 3, 1, 6, 4, 4, 1, 10, 5, 5, 5, 1, 20, 15, 6, 6, 6, 1, 35, 21, 7, 7, 7, 7, 1, 70, 28, 28, 8, 8, 8, 8, 1, 126, 84, 36, 9, 9, 9, 9, 9, 1, 252, 120, 45, 45, 10, 10, 10, 10, 10, 1, 462, 165, 55, 55, 11, 11, 11, 11, 11, 11, 1, 924, 495, 220, 66, 66, 12, 12, 12, 12, 12, 12

Offset

1,3

Links

Seiichi Manyama, Rows n = 1..140, flattened

Example

Rows start:
  1;
  1,  2;
  1,  3, 3;
  1,  6, 4, 4;
  1, 10, 5, 5, 5;
  ...

Crossrefs

Row sums are A051054.

Columns include (most of) A000012, A001405, A051033, A051036, A051052, A051053, A062947 etc.

n appears A008619 times in the n-th row.

Cf. A060539.

Sequence in context: A153341 A127119 A322265 * A262917 A165007 A284979

Adjacent sequences: A066701 A066702 A066703 * A066705 A066706 A066707

Keyword

nonn,tabl

Author

Henry Bottomley, Jan 14 2002

Status

approved