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 A046531 Numerators of elements to right of central elements of 1/2-Pascal triangle (by row). 0
 1, 1, 3, 1, 5, 1, 11, 7, 1, 9, 9, 1, 20, 27, 11, 1, 67, 19, 13, 1, 147, 105, 51, 15, 1, 126, 78, 33, 17, 1, 273, 204, 111, 83, 19, 1, 477, 315, 305, 51, 21, 1, 1023, 792, 935, 407, 123, 23, 1, 1815, 2519, 671, 265, 73, 25, 1, 3861, 6149, 3861, 936, 338, 171 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Table of n, a(n) for n=1..62. Thomas M. Richardson, The three 'R's and Dual Riordan Arrays, arXiv:1609.01193 [math.CO], 2016. EXAMPLE 1/1; 1/1 1/1; --> 1 1/1 1/2 1/1; --> 1 1/1 3/2 3/2 1/1; --> 3 1 1/1 5/2 3/1 5/2 1/1; --> 5 1 1/1 7/2 11/2 11/2 7/2 1/1; --> 11 7 1 1/1 9/2 9/1 11/1 9/1 9/2 1/1; --> 9 9 1 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 20 27 11 1 CROSSREFS Cf. A046213, A046226. Sequence in context: A112031 A146285 A146059 * A289310 A160085 A147024 Adjacent sequences: A046528 A046529 A046530 * A046532 A046533 A046534 KEYWORD tabf,nonn,less AUTHOR Mohammad K. Azarian EXTENSIONS More terms from Sean A. Irvine, Apr 13 2021 STATUS approved

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Last modified September 24 19:02 EDT 2023. Contains 365581 sequences. (Running on oeis4.)