id:A057417 - OEIS Search Results

Search: id:A057417

Displaying 1-1 of 1 results found.

page 1

Number of staircase polygons of area n with any number of (staircase polygon) holes on square lattice (not allowing rotations).

+0
1

1, 2, 4, 9, 20, 46, 105, 243, 561, 1303, 3026, 7047, 16419, 38314, 89454, 209056, 488810, 1143686, 2677074, 6269438, 14687799, 34423317, 80702234, 189258382, 443958607, 1041704375, 2444830929, 5739200960, 13475465449 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`I. Jensen, Table of n, a(n) for n = 1..76 (from link below)` `I. Jensen, More terms`
	CROSSREFS	`Sequence in context: A006958 A036617 A007902 this_sequence A000968 A005908 A085748` `Adjacent sequences: A057414 A057415 A057416 this_sequence A057418 A057419 A057420`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 30 2000`

page 1

Search completed in 0.002 seconds

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research