id:A101510 - OEIS Search Results

Search: id:A101510

Displaying 1-1 of 1 results found.

page 1

Diagonal sums of binomial-Mobius product.

+0
2

1, 2, 5, 10, 21, 43, 87, 175, 352, 707, 1417, 2836, 5674, 11353, 22716, 45443, 90886, 181748, 363451, 726870, 1453773, 2907648, 5815315, 11630195, 23259059, 46515887, 93029852, 186060921, 372129424, 744272221, 1488552317, 2977079872 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Diagonal sums of A101508.`
	FORMULA	`a(n)=sum{k=0..floor(n/2), sum{i=0..n-k, if(mod(i+1, k+1)=0, binomial(n-k, i), 0)}}`
	CROSSREFS	`Adjacent sequences: A101507 A101508 A101509 this_sequence A101511 A101512 A101513` `Sequence in context: A000975 A032283 A027437 this_sequence A066819 A114279 A101400`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Dec 05 2004`

page 1

Search completed in 0.002 seconds

Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

AT&T Labs Research