A116282
Numbers k such that k*(k+6) gives the concatenation of two numbers m and m-1.
Original entry on oeis.org
7744, 8018, 33294315, 66705680, 98000198, 340465755422, 476452552742, 523547447253, 659534244573, 866013200678, 998000001998, 3695104677080131, 3755782995538765, 4198081170077528, 4803478892324963, 5196521107675032
Offset: 1
98000198 * 98000204 = 96040393//96040392, where // denotes concatenation.
A116317
Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+4.
Original entry on oeis.org
7745, 8019, 33294316, 66705681, 98000199, 340465755423, 476452552743, 523547447254, 659534244574, 866013200679, 998000001999, 3695104677080132, 3755782995538766, 4198081170077529, 4803478892324964, 5196521107675033
Offset: 1
98000199 * 98000203 = 96040393//96040397, where // denotes concatenation.
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.
A116335
Numbers k such that k*(k+2) gives the concatenation of two numbers m and m+7.
Original entry on oeis.org
7746, 8020, 33294317, 66705682, 98000200, 340465755424, 476452552744, 523547447255, 659534244575, 866013200680, 998000002000, 3695104677080133, 3755782995538767, 4198081170077530, 4803478892324965, 5196521107675034
Offset: 1
98000200 * 98000202 = 96040393//96040400, where // denotes concatenation.