id:A076816 - OEIS Search Results

Search: id:A076816

Displaying 1-1 of 1 results found.

page 1

Squares modulo triangular numbers: n^2 minus the greatest triangular number smaller than or equal to n^2.

+0
2

0, 0, 1, 3, 1, 4, 0, 4, 9, 3, 9, 1, 8, 16, 6, 15, 3, 13, 24, 10, 22, 6, 19, 1, 15, 30, 10, 26, 4, 21, 39, 15, 34, 8, 28, 0, 21, 43, 13, 36, 4, 28, 53, 19, 45, 9, 36, 64, 26, 55, 15, 45, 3, 34, 66, 22, 55, 9, 43, 78, 30, 66, 16, 53, 1, 39, 78, 24, 64, 8, 49, 91, 33, 76, 16, 60, 105, 43 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a(n)=n^2-floor(sqrt(2n^2+1/4)-1/2)floor(sqrt(2*n^2+1/4)+1/2)/2`
	MAPLE	`seq(n^2-floor(sqrt(2n^2+1/4)-1/2)floor(sqrt(2*n^2+1/4)+1/2)/2, n=0..100);`
	CROSSREFS	`Cf. A064784.` `Sequence in context: A125162 A123730 A130540 this_sequence A021765 A051512 A079668` `Adjacent sequences: A076813 A076814 A076815 this_sequence A076817 A076818 A076819`
	KEYWORD	`nonn,easy`
	AUTHOR	`Floor van Lamoen (fvlamoen(AT)hotmail.com), Oct 17 2002`

page 1

Search completed in 0.002 seconds

Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.

AT&T Labs Research