A116172
Numbers k such that k concatenated with k+2 gives the product of two numbers which differ by 5.
Original entry on oeis.org
2, 74, 59264, 510782, 906902, 81790664, 92776472, 10876856041862, 11796926254874, 18332259798794, 18388650720624, 32624670587648, 32699883214248, 43103618706398, 44916698243804, 66132258426302
Offset: 1
92776472//92776474 = 96320542 * 96320547, where // denotes concatenation.
92776472//92776480 = 96320544 * 96320545.
92776472//92776478 = 96320543 * 96320546.
A116205
Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 3.
Original entry on oeis.org
1, 81, 1353, 3997, 7723, 23761, 26271, 76771, 1415683, 3890571, 8495497, 1066870443, 1239366513, 4198438981, 4534273891, 6502317141, 6918679731, 2199164200036329043, 2820114781174460091, 5500888421709400741
Offset: 1
A116133
Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 9.
Original entry on oeis.org
64, 1876, 3214, 8776, 17227120144584448354, 19391087990479091186, 21557280540171744040, 23970390649400564404, 26051259424903756364, 28697643366269876506, 31320461807899711990, 34215988012600009664
Offset: 1
8776//8772 = 9364 * 9373, where // denotes concatenation. Also 8776//8780 = 9365 * 9372.
A116119
Numbers k such that k concatenated with k-6 gives the product of two numbers which differ by 7.
Original entry on oeis.org
96, 150, 186, 324, 376, 666, 996, 2046, 3000, 9996, 82650, 99996, 100384, 466716, 999996, 1322316, 4049584, 9999996, 67820074, 99999996, 110003884, 135734074, 156502836, 196043286, 213017754, 238849000, 261405396, 289940826
Offset: 1
9802960500//9802960494 = 9900990099 * 9900990106, where // denotes concatenation.
A116131
Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 6.
Original entry on oeis.org
20, 31, 14564, 38239, 69919, 120395, 426436, 902596, 7478020, 9090220, 6671332084, 8114264059, 8482227259, 9900250996, 2244338786836, 2490577152964, 2509440638591, 2769448208395, 7012067592220
Offset: 1
9900250996//9900250992 = 9950000498 * 9950000504, where // denotes concatenation.
A116263
n times n+7 gives the concatenation of two numbers m and m-4.
Original entry on oeis.org
83, 76980, 714687, 952311, 90438188, 96320541, 32980078899026, 34346653774235, 42816188292270, 42881990066485, 57118009933509, 57183811707724, 65653346225759, 67019921100968, 81321742742207
Offset: 1
96320541 * 96320548 = 92776472//92776468, where // denotes
concatenation.
Showing 1-6 of 6 results.
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