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 A116112 Numbers k such that k concatenated with k-7 gives the product of two numbers which differ by 7. 16
 17, 35, 10408517, 45884051, 62918301, 1116290522645838319925, 1491109615209578451401, 2254276950187476704727, 2758431647767103545151, 3768131911733856383477, 4434103687048263321737, 5230580700713956424051 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 5. Also numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 3. Also numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 1. LINKS EXAMPLE 62918301//62918300 = 79321055 * 79321060, where // denotes concatenation. 62918301//62918304 = 79321056 * 79321059. 62918301//62918306 = 79321057 * 79321058. CROSSREFS Cf. A116107, A115426, A116113, A116119, A116243. Cf. A116163, A115429, A116158, A116281. Cf. A116171, A116177, A116179, A116185, A116309, A115430, A116322. Sequence in context: A041574 A144534 A041576 * A190755 A098849 A319059 Adjacent sequences:  A116109 A116110 A116111 * A116113 A116114 A116115 KEYWORD nonn,base,changed AUTHOR Giovanni Resta, Feb 06 2006 EXTENSIONS Edited by N. J. A. Sloane, Apr 15 2007 STATUS approved

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Last modified July 29 17:41 EDT 2021. Contains 346346 sequences. (Running on oeis4.)