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 A228237 Numbers n for which there exists such a natural number k > n that k + bitcount(k) = n + bitcount(n), where bitcount(k) (A000120) gives the number of 1's in binary representation of nonnegative integer k. 3
 3, 11, 14, 15, 19, 27, 29, 31, 35, 43, 46, 47, 51, 59, 62, 67, 75, 78, 79, 83, 91, 93, 95, 99, 107, 110, 111, 115, 123, 124, 125, 126, 127, 131, 139, 142, 143, 147, 155, 157, 159, 163, 171, 174, 175, 179, 187, 190, 195, 203, 206, 207, 211, 219, 221, 223, 227 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS In other words, all such terms A228236(n) which satisfy A228236(n) < A228087(A092391(A228236(n))). Note: 124 is the first term that occurs both here and in A228091. LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 EXAMPLE For cases 0 + A000120(0) = 0, 1 + A000120(1) = 2, 2 + A000120(2) = 3 there are no larger solutions yielding the same result. However, for 3 + A000120(3) = 5 there is a larger solution yielding the same result, namely 4 + A000120(4) = 5, thus 3 is the first term of this sequence. Next time this occurs for 11, as 11 + A000120(11) = 14 = 12 + A000120(12), and 12 > 11. PROG (Scheme, with Antti Karttunen's IntSeq-library) (define A228237 (MATCHING-POS 1 1 (lambda (n) (< n (A228087 (A092391 n)))))) CROSSREFS Subset of A228236. Cf. also A228091. Sequence in context: A201426 A158790 A176049 * A186078 A224857 A322608 Adjacent sequences:  A228234 A228235 A228236 * A228238 A228239 A228240 KEYWORD nonn AUTHOR Antti Karttunen, Sep 11 2013 STATUS approved

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Last modified September 28 16:40 EDT 2020. Contains 337393 sequences. (Running on oeis4.)