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 A066884 Square array read by antidiagonals where the n-th row contains the positive integers with n binary 1's. 6
 1, 3, 2, 7, 5, 4, 15, 11, 6, 8, 31, 23, 13, 9, 16, 63, 47, 27, 14, 10, 32, 127, 95, 55, 29, 19, 12, 64, 255, 191, 111, 59, 30, 21, 17, 128, 511, 383, 223, 119, 61, 39, 22, 18, 256, 1023, 767, 447, 239, 123, 62, 43, 25, 20, 512, 2047, 1535, 895, 479, 247, 125, 79, 45 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This is a permutation of the positive integers; the inverse permutation is A067587. LINKS Ivan Neretin, Table of n, a(n) for n = 1..8001 Vladimir Dobric, M. Skyers, L. J. Stanley, Polynomial Time Computable Triangular Arrays For Almost Sure Convergence, arXiv preprint arXiv:1603.04896 [math.PR], 2016. [Shows that this sequence is in P-TIME] EXAMPLE Column: 1___2___3___4___5___6 ----------------------------- Row 1:|_1___2___4___8__16__32 Row 2:|_3___5___6___9__10__12 Row 3:|_7__11__13__14__19__21 Row 4:|15__23__27__29__30__39 Row 5:|31__47__55__59__61__62 Row 6:|63__95_111_119_123_125 MATHEMATICA a = {}; Do[ a = Append[a, Last[ Take[ Take[ Select[ Range[2^12], Count[ IntegerDigits[ #, 2], 1] == j - i + 1 & ], j], i]]], {j, 1, 11}, {i, 1, j}]; a CROSSREFS Cf. A000120. Selected rows: A000079 (1), A018900 (2), A014311 (3), A014312 (4), A014313 (5), A023688 (6), A023689 (7), A023690 (8), A023691 (9), A038461 (10), A038462 (11), A038463 (12). For decimal analogs, see A011557 and A038444-A038452. Selected columns: A000225 (1), A055010 (2). Selected diagonals: A036563 (main), A000918 (1st upper), A153894 (2nd upper). [Franklin T. Adams-Watters, Apr 22 2009] Sequence in context: A283940 A163255 A297932 * A171429 A191448 A191447 Adjacent sequences:  A066881 A066882 A066883 * A066885 A066886 A066887 KEYWORD nonn,tabl,base AUTHOR Jared Benjamin Ricks (jaredricks(AT)yahoo.com), Jan 21 2002 EXTENSIONS Corrected and extended by Henry Bottomley, Jan 27 2002 STATUS approved

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Last modified January 18 16:40 EST 2019. Contains 319271 sequences. (Running on oeis4.)