A095832 Triangle read by rows: T(n,k) = (n-k+1)*(n-k), n>=1, 1<=k<=n.

0, 2, 0, 6, 2, 0, 12, 6, 2, 0, 20, 12, 6, 2, 0, 30, 20, 12, 6, 2, 0, 42, 30, 20, 12, 6, 2, 0, 56, 42, 30, 20, 12, 6, 2, 0, 72, 56, 42, 30, 20, 12, 6, 2, 0, 90, 72, 56, 42, 30, 20, 12, 6, 2, 0, 110, 90, 72, 56, 42, 30, 20, 12, 6, 2, 0, 132, 110, 90, 72, 56, 42, 30, 20, 12, 6, 2, 0

Offset

1,2

Links

Michel Marcus, Rows n=1..100 of triangle, flattened (terms 1..1000 from Harvey P. Dale)

Example

Triangle begins:
   0;
   2,  0;
   6,  2, 0;
  12,  6, 2, 0;
  20, 12, 6, 2, 0;
  ...

Mathematica

Table[(n-k+1)(n-k), {n, 20}, {k, n}]//Flatten (* Harvey P. Dale, Apr 17 2016 *)

Crossrefs

Cf. A002378.

Sequence in context: A368377 A119883 A020853 * A248162 A143381 A322093

Adjacent sequences: A095829 A095830 A095831 * A095833 A095834 A095835

Keyword

easy,nonn,tabl

Author

Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 10 2004

Status

approved