A381248 - cp's OEIS frontend

A381248 a(n) = least positive integer m such that m*(m+1) has n-2 distinct digits in base n, all distinct from those (base-n digits) of m and m+1.

n	a(n)
2	1
3	4
4	14
5	156
6	20
7	750
8	1763
9	22142
10	77776
11	64420
12	2443077
13	52663933
14	227623468
15	1097568095
16	3149642939
17	81965144711
18	105625962315
19	143416754568
20	8084207326294
21	2574579252942508
22	14079288482520493
23	68732231173154643
24	33344665050312525
25	350798169613138819009
26	201175550741393337488

[1, 4, 14, 156, 20, 750, 1763, 22142, 77776, 64420, 2443077, 52663933, 227623468, 1097568095, 3149642939, 81965144711, 105625962315, 143416754568, 8084207326294, 2574579252942508, 14079288482520493, 68732231173154643, 33344665050312525, 350798169613138819009, 201175550741393337488]

cp's OEIS Frontend

A381248 a(n) = least positive integer m such that m*(m+1) has n-2 distinct digits in base n, all distinct from those (base-n digits) of m and m+1.

Table of values

List of values