A281383 Triangle read by rows T(n,k) is the least integer with more than 1 digit in base n and k, such that the set of its base_n digits equals the set of its base_k digits.

2, 9, 3, 4, 22, 4, 5, 7, 28, 5, 6, 36, 55, 46, 6, 49, 51, 9, 17, 68, 7, 8, 17, 64, 91, 708, 94, 8, 9, 9, 81, 11, 212, 31, 124, 9, 10, 10, 13, 213, 331, 23, 614, 158, 10, 11, 23, 124, 385, 13, 38, 145, 49, 196, 11, 12, 12, 25, 49, 289, 61, 475, 2035, 1880, 238, 12

Offset

2,1

Links

Table of n, a(n) for n=2..67.

Formula

T(n, n) = n.

Example

Triangle starts:
2;
9, 3;
4, 22, 4;
5, 7, 28, 5;
6, 36, 55, 46, 6;
49, 51, 9, 17, 68, 7;
8, 17, 64, 91, 708, 94, 8;
...

Prog

(PARI) T(n, k) = my(m=min(n, k)); while (Set(digits(m, n)) != Set(digits(m, k)), m++); m;
tabl(nn) = {for (n=2, nn, for (k=2, n, print1(T(n, k), ", "); ); print(); ); }

Crossrefs

Cf. A033170, A037408-A037443.

Cf. A281384 (first column).

Sequence in context: A111689 A085093 A194025 * A275838 A323720 A021777

Adjacent sequences: A281380 A281381 A281382 * A281384 A281385 A281386

Keyword

nonn,base,tabl

Author

Michel Marcus, Jan 21 2017

Status

approved