The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A056234 Form an array with 3 rows: row 1 begins with 1; all rows are increasing; each entry is sum of 2 entries above it; each number appears at most once; smallest unused number is appended to first row if possible. Sequence gives numbers not used. 8
 5, 24, 29, 42, 72, 90, 93, 112, 120, 125, 138, 158, 172, 175, 192, 197, 200, 205, 208, 213, 218, 230, 235, 264, 282, 285, 302, 305, 310, 321, 324, 329, 333, 364, 372, 375, 378, 386, 416, 430, 439, 452, 455, 477, 496, 504, 509, 522, 542, 556 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Zak Seidov and Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 EXAMPLE Array begins 1 2 4 7 8 10 12 ... .3 6 11 15 18 ... . 9 17 26 33 ... PROG (Haskell) a056234 n = a056234_list !! (n-1) a056234_list = notUsed 1 a056231_list a056232_list a056233_list where notUsed x us'@(u:us) vs'@(v:vs) ws'@(w:ws) | x == u = notUsed (x + 1) us vs' ws' | x == v = notUsed (x + 1) us' vs ws' | x == w = notUsed (x + 1) us' vs' ws | otherwise = x : notUsed (x + 1) us' vs' ws' -- Reinhard Zumkeller, Nov 07 2011 CROSSREFS Cf. A056231, A056232, A056233. See also A057153, A052474, A057154, A056230. Sequence in context: A333633 A222355 A335352 * A030766 A063143 A006145 Adjacent sequences: A056231 A056232 A056233 * A056235 A056236 A056237 KEYWORD nonn,nice,easy AUTHOR N. J. A. Sloane, E. M. Rains, Aug 22 2000 STATUS approved

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

Last modified December 7 23:32 EST 2022. Contains 358671 sequences. (Running on oeis4.)