id:A028275 - OEIS Search Results

Search: id:A028275

Displaying 1-1 of 1 results found.

page 1

Elements in 4-Pascal triangle (by row).

+0
15

1, 1, 1, 1, 4, 1, 1, 5, 5, 1, 1, 6, 10, 6, 1, 1, 7, 16, 16, 7, 1, 1, 8, 23, 32, 23, 8, 1, 1, 9, 31, 55, 55, 31, 9, 1, 1, 10, 40, 86, 110, 86, 40, 10, 1, 1, 11, 50, 126, 196, 196, 126, 50, 11, 1, 1, 12, 61, 176, 322, 392, 322, 176, 61, 12, 1, 1, 13, 73, 237, 498, 714, 714, 498, 237 (list; graph; listen)

	OFFSET	`0,5`
	FORMULA	`Apart from first 3 rows, use the Pascal rule.` `T(n, k) = C(n, k) + 2C(n-2, k-1). G.f.: (1+2x^2y) / [1-x(1+y)]. - R. Stephan, Jan 31 2005`
	EXAMPLE	`1; 1 1; 1 4 1; 1 5 5 1; 1 6 10 6 1; ...`
	CROSSREFS	`Cf. A028262, A028313.` `Sequence in context: A016522 A153843 A099575 this_sequence A147289 A147566 A146770` `Adjacent sequences: A028272 A028273 A028274 this_sequence A028276 A028277 A028278`
	KEYWORD	`easy,nonn`
	AUTHOR	`Mohammad K. Azarian (ma3(AT)evansville.edu)`
	EXTENSIONS	`More terms from Ben Baugher (s1191623(AT)cedarville.edu)`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research