A171698 Square 'central binomial coefficients'-array read by antidiagonals

1, 1, 1, 2, 2, 2, 6, 6, 4, 4, 20, 20, 14, 8, 8, 70, 70, 50, 30, 16, 16, 252, 252, 182, 112, 62, 32, 32, 924, 924, 672, 420, 238, 126, 64, 64

Offset

1,4

Comments

Antidiagonals sum up to A000984.

Links

Table of n, a(n) for n=1..36.

Example

Example with 0's added:
0,1,1,2,4,8,..
0,1,2,4,8,16,..
0,2,6,14,30,..
Row 2 (binomial): 0+1=1,1+1=2,...
Row 3 (trinomial): 0+1+1=2,2+2+2=6,6+4+4=14...

Crossrefs

Cf. A000984, A011782, A009766, A007318.

Sequence in context: A242010 A283673 A198472 * A339385 A080969 A214078

Adjacent sequences: A171695 A171696 A171697 * A171699 A171700 A171701

Keyword

nonn,tabl

Author

Mark Dols, Dec 15 2009

Status

approved