A110415 - OEIS

A110415

a(n) = n concatenated with n! divided by n.

11, 11, 12, 106, 1024, 1120, 10720, 105040, 1040320, 10362880, 103628800, 1039916800, 10479001600, 106227020800, 10087178291200, 101307674368000, 1020922789888000, 10355687428096000, 1006402373705728000

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

a(14) = 106227020800.

14 concatenated with 14! is 1487178291200 and 1487178291200/14 = 106227020800.

MAPLE

c:=proc(x, y) local s: s:=proc(m) nops(convert(m, base, 10)) end: x*10^s(y)+y: end: a:=n->c(n, n!)/n: seq(a(n), n=1..22); # c yields the concatenation of two positive integers # Emeric Deutsch, Aug 07 2005

MATHEMATICA

Table[FromDigits[Join[IntegerDigits[n], IntegerDigits[n!]]]/n, {n, 20}] (* Harvey P. Dale, Sep 07 2022 *)

PROG

(PARI) a(n) = fromdigits(concat(digits(n), digits(n!)))/n; \\ Michel Marcus, Aug 18 2019

CROSSREFS

Cf. A110414.

Sequence in context: A273979 A079596 A134036 * A052257 A246400 A180022

Adjacent sequences: A110412 A110413 A110414 * A110416 A110417 A110418

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 01 2005

EXTENSIONS

More terms from Emeric Deutsch, Aug 07 2005

STATUS

approved