A116130
Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 5.
Original entry on oeis.org
8, 98, 590, 738, 830, 998, 1080, 4508, 9998, 20660, 29754, 99998, 980300, 999998, 6694218, 9999998, 49826988, 99999998, 117738578, 131505858, 132231404, 176445054, 177285320, 247979808, 252028388, 335180054, 336337790
Offset: 1
7531357568//7531357564 = 8678339452 * 8678339457, where // denotes concatenation.
A116125
Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 6.
Original entry on oeis.org
7, 97, 205, 300, 477, 732, 997, 1920, 3157, 9997, 52896, 99997, 120085, 427020, 999997, 8264460, 9999997, 88581312, 99999997, 112000885, 112917765, 143075580, 152863360, 193537077, 233788192, 266755221, 313680096
Offset: 1
6786111717//6786111712 = 8237785936 * 8237785942, where // denotes concatenation.
A116118
Numbers k such that k concatenated with k-6 gives the product of two numbers which differ by 5.
Original entry on oeis.org
10, 12, 100, 102, 132, 406, 510, 852, 1000, 1002, 7930, 10000, 10002, 66942, 100000, 100002, 113322, 440056, 1000000, 1000002, 5289256, 10000000, 10000002, 58477510, 100000000, 100000002, 111333222, 164378892, 183673470
Offset: 1
1000000000//999999994 = 999999998 * 1000000003, where // denotes concatenation.
A116255
n times n+5 gives the concatenation of two numbers m and m-5.
Original entry on oeis.org
76, 80917, 91807, 326508, 475023, 524973, 673488, 4323775, 4767130, 5232866, 5676221, 4083911139, 4975000248, 5024999748, 5916088857, 9503960494, 9604950394, 4186904462790, 4313465946773, 5686534053223, 5813095537206
Offset: 1
Showing 1-4 of 4 results.
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