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 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. 1

%I

%S 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,

%T 8,9,9,81,11,212,31,124,9,10,10,13,213,331,23,614,158,10,11,23,124,

%U 385,13,38,145,49,196,11,12,12,25,49,289,61,475,2035,1880,238,12

%N 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.

%F T(n, n) = n.

%e Triangle starts:

%e 2;

%e 9, 3;

%e 4, 22, 4;

%e 5, 7, 28, 5;

%e 6, 36, 55, 46, 6;

%e 49, 51, 9, 17, 68, 7;

%e 8, 17, 64, 91, 708, 94, 8;

%e ...

%o (PARI) T(n, k) = my(m=min(n,k)); while (Set(digits(m, n)) != Set(digits(m,k)), m++); m;

%o tabl(nn) = {for (n=2, nn, for (k=2, n, print1(T(n,k), ", ");); print(););}

%Y Cf. A033170, A037408-A037443.

%Y Cf. A281384 (first column).

%K nonn,base,tabl

%O 2,1

%A _Michel Marcus_, Jan 21 2017

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Last modified June 15 02:56 EDT 2021. Contains 345042 sequences. (Running on oeis4.)