A116112
Numbers k such that k concatenated with k-7 gives the product of two numbers which differ by 7.
Original entry on oeis.org
17, 35, 10408517, 45884051, 62918301, 1116290522645838319925, 1491109615209578451401, 2254276950187476704727, 2758431647767103545151, 3768131911733856383477, 4434103687048263321737, 5230580700713956424051
Offset: 1
62918301//62918300 = 79321055 * 79321060, where // denotes concatenation.
62918301//62918304 = 79321056 * 79321059.
62918301//62918306 = 79321057 * 79321058.
A116323
n times n+4 gives the concatenation of two numbers m and m+5.
Original entry on oeis.org
463, 534, 716, 820, 3426, 6571, 90905, 980200, 3636359, 6363638, 41176466, 58823531, 413533836, 426573428, 428571424, 432620007, 567379990, 571428573, 573426569, 586466161, 686261109, 725274727, 727272723, 731321306
Offset: 1
A116314
Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+4.
Original entry on oeis.org
28, 72, 79822845, 69852478553064869297984899963807, 77473062193002372448027740546439, 77747359197583788609974143907619, 84341826458653210947638195982115, 85367942837521291760016984490251
Offset: 1
79822845 * 79822846 = 63716866//63716870, where // denotes concatenation.
A116329
Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+6.
Original entry on oeis.org
387, 431, 569, 613, 816, 4523, 5477, 90912, 316834, 683166, 3636366, 6363634, 82352944, 331668334, 368421055, 395604393, 442767756, 461538464, 488721802, 511278198, 538461536, 557232244, 604395607, 631578945, 668331666
Offset: 1
Showing 1-4 of 4 results.
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