A125700 - OEIS

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A125700

Number of connected categories with n more morphisms than objects.

1, 3, 15, 77 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Eric Weisstein's World of Mathematics, Category`
	FORMULA	`a(n) = Sum_{k=1}^{n+1} A125699(n+k,k}`
	CROSSREFS	`Cf. A125696, A125699, A125701.` `Sequence in context: A019477 A019478 A151327 * A037766 A037654 A074561` `Adjacent sequences: A125697 A125698 A125699 * A125701 A125702 A125703`
	KEYWORD	`bref,hard,more,nonn`
	AUTHOR	`Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net) and Christian Bower (bowerc(AT)usa.net), Jan 05 2007`

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Last modified February 15 08:45 EST 2012. Contains 205736 sequences.