A280447 Like A065759 but where f(n) = 3*n.

176594, 281894, 371894, 446594, 1765940, 2818940, 2822594, 3718940, 3722594, 4465940, 17659400, 28189400, 28225940, 37189400, 37225940, 44659400

Offset

1,1

Comments

Numbers of the form 176594*10^k, 281894*10^k, 371894*10^k, 446594*10^k, etc., with k>=0, belong to the sequence.

Links

Table of n, a(n) for n=1..16.

Example

176594 = concat(1,76594) = concat(17,6594) = concat(176,594) = concat(1765,94) = concat(17659,4) and (1*76594 + 17*6594 + 176*594 + 1765*94 + 17659*4) = 529782 = 3*176594.

Maple

P:=proc(q) local a, k, n; for n from 1 to q do a:=0;
for k from 1 to ilog10(n) do a:=a+(n mod 10^k)*trunc(n/10^k); od;
if a/n=3 then print(n); fi; od; end: P(10^9);

Crossrefs

Cf. A065759, A280445, A280446.

Sequence in context: A273727 A368419 A203406 * A205177 A205276 A321827

Adjacent sequences: A280444 A280445 A280446 * A280448 A280449 A280450

Keyword

nonn,base,more

Author

Paolo P. Lava, Jan 03 2017

Status

approved