This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A094415 Triangle T read by rows: dot product * . 9
 1, 4, 5, 10, 13, 13, 20, 26, 28, 26, 35, 45, 50, 50, 45, 56, 71, 80, 83, 80, 71, 84, 105, 119, 126, 126, 119, 105, 120, 148, 168, 180, 184, 180, 168, 148, 165, 201, 228, 246, 255, 255, 246, 228, 201, 220, 265, 300, 325, 340, 345, 340, 325, 300, 265, 286, 341 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA T(r, s) = r[r^2 + 3r(1+s) + 2 - 3s^2], r>0, 0<=s<=r. EXAMPLE 1 4 5 10 13 13 20 26 28 26 35 45 50 50 45 56 71 80 83 80 71 CROSSREFS Columns 0-6 are A000292, A008778, A026054, A026057, A026060, A026063, A026066. Half-diagonal is A050410, row sums are A000537. See also A094414, A088003. Sequence in context: A217571 A058335 A222353 * A114517 A283246 A236283 Adjacent sequences:  A094412 A094413 A094414 * A094416 A094417 A094418 KEYWORD nonn,tabl AUTHOR Ralf Stephan, May 02 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 21 05:06 EDT 2018. Contains 316404 sequences. (Running on oeis4.)