A116215
Numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 7.
Original entry on oeis.org
92, 180, 332, 486, 536, 9720, 13220, 40502, 941486, 2066120, 2975202, 77854680, 123250136, 162423540, 243964010, 256109750, 356387462, 421110162, 542936282, 547361900, 587114192, 591715970, 685172036, 734693886
Offset: 1
A116211
Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 9.
Original entry on oeis.org
1953, 3115, 6153, 1016574047215119910181525023, 2440558249789368730986767575, 2560156942576450203707692923, 4639822375038697733267413875, 4868700733912235016077891029
Offset: 1
6153//6160 = 7840 * 7849, where // denotes concatenation.
A116347
n times n+9 gives the concatenation of two numbers m and m+8.
Original entry on oeis.org
345, 647, 829, 878, 933, 33180, 42271, 57721, 66812, 316429537030539, 319485532390187, 328611858418903, 332707864512186, 339600869407914, 347417506407134, 355879196889561, 370588838784509, 383811170906508
Offset: 1
66812 * 66821 = 44644//44652, where // denotes concatenation.
A116224
Numbers k such that k concatenated with k+9 gives the product of two numbers which differ by 9.
Original entry on oeis.org
23, 27, 10357253, 10577583, 45531191, 45991881, 12823841629508531559818193, 17153953024599261169512903, 34319291138166088695725681, 41203057971387248588060861, 75861857890090990570762781
Offset: 1
45991881//45991890 = 67817310 * 67817319, where // denotes concatenation.
Showing 1-4 of 4 results.