A116109
Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 9.
Original entry on oeis.org
94, 210, 294, 994, 5880, 9994, 52888, 99994, 127044, 414180, 999994, 8264470, 9999994, 12456750, 41868508, 99999994, 112670544, 441341880, 468144040, 669421494, 702338994, 715976338, 750005718, 960645294, 999999994
Offset: 1
8505429358//8505429350 = 9222488466 * 9222488475, where // denotes concatenation.
A116239
Numbers k such that k*(k+8) gives the concatenation of two numbers m and m-8.
Original entry on oeis.org
7743, 8017, 33294314, 66705679, 98000197, 340465755421, 476452552741, 523547447252, 659534244572, 866013200677, 998000001997, 3695104677080130, 3755782995538764, 4198081170077527, 4803478892324962, 5196521107675031
Offset: 1
98000197 * 98000205 = 96040393//96040385, where // denotes concatenation.
A116245
n times n+9 gives the concatenation of two numbers m and m-7.
Original entry on oeis.org
8, 698, 775, 789, 866, 42336, 57656, 96882, 44121665, 55878327, 85298136, 36680703009575609347721358492, 63319296990424390652278641500, 69346342454876071597336150480, 81501115172242572470460459682
Offset: 1
85298136 * 85298145 = 72757727//72757720, where // denotes
concatenation.
A116231
Numbers k such that k*(k+9) gives the concatenation of two numbers m and m-9.
Original entry on oeis.org
7, 63, 42752, 57240, 75422, 425071, 574921, 979527, 4301392, 5698600, 7028665, 4925000746, 5074999246, 7748266573, 8511881483, 8814851183, 7059602159671, 7106167933827, 7439286611620, 7485852385776, 46791112884924
Offset: 1
Showing 1-4 of 4 results.