id:A074225 - OEIS Search Results

Search: id:A074225

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a(n) = n * Sum_{d|n} d*2^(d-1).

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1, 10, 39, 148, 405, 1254, 3143, 8488, 20853, 52050, 123915, 297804, 692237, 1611974, 3687795, 8405584, 18939921, 42512562, 94634003, 209819940, 462431697, 1015269486, 2218786839, 4832458392, 10485762025, 22684180610, 48922424415, 105229923596 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`N. J. A. Sloane and Thomas Wieder, The Number of Hierarchical Orderings, Order 21 (2004), 83-89.`
	CROSSREFS	`Equals n*A83413(n).` `Sequence in context: A156674 A022277 A059722 this_sequence A055514 A055233 A104045` `Adjacent sequences: A074222 A074223 A074224 this_sequence A074226 A074227 A074228`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jun 15 2003`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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