A078548 a(n) = lcm(n, A052429(n)) - A052429(n).

0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 10, 10, 36, 24, 10, 42, 112, 64, 162, 18, 40, 20, 132, 20, 40, 72, 364, 48, 504, 27, 90, 90, 30, 192, 90, 30, 756, 432, 108, 36, 160, 80, 504, 40, 160, 264, 1288, 40, 1728, 45, 250, 250, 780, 520, 50, 810, 1960, 1120, 2610, 54, 360, 180

Offset

1,10

Links

Table of n, a(n) for n=1..62.

Mathematica

lc[x_] := Apply[LCM, DeleteCases[IntegerDigits[x], 0]] Table[LCM[lc[w], w]-lc[w], {w, 1, 128}]

Prog

(PARI) lcnzd(n) = lcm(select(x->(x!=0), digits(n)));
a(n) = my(lc=lcnzd(n)); lcm(n, lc) - lc; \\ Michel Marcus, Mar 18 2018

Crossrefs

Cf. A052429, A078546, A078547, A002796.

Sequence in context: A063543 A096166 A240919 * A095777 A168099 A004498

Adjacent sequences: A078545 A078546 A078547 * A078549 A078550 A078551

Keyword

nonn,base

Author

Labos Elemer, Dec 05 2002

Status

approved