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 A212315 Numbers m such that B(m) = B(triangular(m)), where B(m) is the binary weight of m (A000120). 1
 0, 1, 3, 7, 15, 31, 39, 45, 63, 78, 79, 91, 93, 127, 139, 143, 158, 159, 175, 182, 187, 189, 222, 255, 286, 287, 318, 319, 351, 367, 375, 379, 381, 407, 446, 487, 511, 535, 543, 572, 574, 575, 607, 627, 638, 639, 703, 724, 727, 731, 747, 750, 759, 763, 765, 799, 823, 830 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS FORMULA A000120(a(n)) = A000120(a(n)*(a(n)+1)/2). CROSSREFS Cf. A000120, A077436, A083567, A118655, A212314. Sequence in context: A098583 A275531 A275532 * A043729 A331503 A137170 Adjacent sequences:  A212312 A212313 A212314 * A212316 A212317 A212318 KEYWORD nonn,base,easy AUTHOR Alex Ratushnyak, Oct 24 2013 STATUS approved

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Last modified January 23 20:39 EST 2021. Contains 340386 sequences. (Running on oeis4.)