A171075 - OEIS

A171075

Total number of balls on lawn in variant of the tennis ball problem (cf. A171074);

1, 20, 190, 1226, 6878, 35962, 180080 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Apparently equals A051133(n) - A005893(n) after 1st term.` `Note that A051133 yields the totals of all C(2n, n) ball sets and A005893 and A090288 are the respective totals of impossible combinations given the rules.`
	REFERENCES	`David Scambler, Just for fun, more tennis balls, Posting to the Sequence Fans Mailing List, Aug 25 2010.`
	LINKS	`Table of n, a(n) for n=1..7.`
	CROSSREFS	`Sequence in context: A010936 A014806 A022615 * A061180 A125383 A126541` `Adjacent sequences: A171072 A171073 A171074 * A171076 A171077 A171078`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane, Sep 06 2010`
	STATUS	`approved`

Last modified March 23 23:09 EDT 2023. Contains 361454 sequences. (Running on oeis4.)