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 A084293 a(n) = 2n + A054905(n). 2
 436, 305635361, 110, 35, 195566, 77, 26, 55, 38, 76, 938, 104, 212308, 85, 74, 106677, 86, 161 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequence begins 436, 305635361, 110, 35, 195566, 77, 26, 55, 38, 76, 938, 104, 212308, 85, 74, 106677, 86, 161, ?, 91, 87, 92, 122, 111, 1585396, 145, 94, 76627, 10283, 159, 772, 133, 122, 412, 194, 142, 964, 205, 374, 925, 6725, 209, ?, 1015, 178, ?, ?, 206, 146, ?, ..., where the other missing terms (designated by "?") are unknown, if they exist (see also A206768). LINKS FORMULA Composite x satisfying sigma(x-2n) = sigma(x) - 2n. EXAMPLE To terms of A054905, where sigma(x+2n)=sigma(x)+2n replacing x+2n=y,x=y-2n, we get sigma(y)-2n=sigma(y-2n); For several analogous sequences, the corresponding "mirror-solutions" can be easily constructed. See: e.g. A015913-A015918; A050507, A054799, A054903-A054906; A054982-A054987; A059118; A055009, A055458, A063500, etc. CROSSREFS Cf. A054905. Sequence in context: A243233 A216988 A190828 * A237939 A088893 A043447 Adjacent sequences:  A084290 A084291 A084292 * A084294 A084295 A084296 KEYWORD nonn,more AUTHOR Labos Elemer, May 26 2003 STATUS approved

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Last modified June 30 02:41 EDT 2022. Contains 354913 sequences. (Running on oeis4.)