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 A115408 Integer permutation induced by A024431. 5
 1, 6, 15, 3, 2, 5, 4, 28, 45, 10, 66, 9, 14, 91, 13, 8, 7, 120, 12, 11, 153, 190, 21, 231, 276, 20, 325, 378, 435, 496, 27, 561, 630, 26, 703, 19, 780, 18, 861, 946, 1035, 17, 16, 25, 1128, 24, 1225, 1326, 1431, 23, 22, 1540, 1653, 36, 1770, 1891, 2016, 2145 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = A115406(n)*(A115406(n)-1)/2 + A115407(n) + 1; inverse: A115409. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 PROG (Haskell) import Data.List (elemIndex); import Data.Maybe (fromJust) a115408 = (+ 1) . fromJust . (`elemIndex` a115409_list) -- Reinhard Zumkeller, Sep 16 2014 CROSSREFS Sequence in context: A281693 A013314 A019306 * A105052 A003566 A205149 Adjacent sequences:  A115405 A115406 A115407 * A115409 A115410 A115411 KEYWORD nonn AUTHOR Reinhard Zumkeller, Jan 22 2006 STATUS approved

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Last modified October 20 20:24 EDT 2019. Contains 328273 sequences. (Running on oeis4.)