A141824 - OEIS

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A141824

Anti-diagonals of table A047888 (which counts longest increasing subsequences and pattern avoidances).

1, 2, 4, 9, 24, 75, 269, 1095, 5039, 26084, 150356 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Note that:` `A000108 avoids string "123"` `A005808 avoids string "1234"` `A047889 avoids string "12345"` `Note also that the left half and central diagonal of A047888 are partial sums of table A047874.`
	EXAMPLE	`We can write A141824(n) = 1 2 4 9 24 ... because A047888 begins` `1` `1 1` `1 2 1` `1 5 2 1` `1 14 6 2 1` `etc.`
	CROSSREFS	`Cf. A000108 (Catalan), A005808, A047889, A047874.` `Sequence in context: A092236 A009283 A125654 * A005001 A091151 A093542` `Adjacent sequences: A141821 A141822 A141823 * A141825 A141826 A141827`
	KEYWORD	`nonn`
	AUTHOR	`Alford Arnold (Alford1940(AT)aol.com), Jul 08 2008`

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Last modified February 16 13:47 EST 2012. Contains 205919 sequences.