A280714 Partial products of A055067.

1, 1, 2, 6, 144, 2880, 2073600, 1306368000, 17557585920000, 637129677864960000, 2312016175036366848000000, 640890883720080890265600000000, 306987758727332698566646824960000000000, 136544225638605874463902854662848512000000000000

Offset

1,3

Comments

A055067(n) = the product of non-divisors of n.

Links

Table of n, a(n) for n=1..14.

Formula

a(n) = Product_{i=1..n} A055067(i).

Mathematica

FoldList[#1 #2 &, Table[Times @@ Complement[Range@ n, Divisors@ n], {n, 14}]] (* Michael De Vlieger, Jan 09 2017 *)

Prog

(Magma) [&*[Factorial(k) / &*[d: d in Divisors(k): k in [1..n]]: n in [1..100]]

Crossrefs

Cf. A055067, A280713.

Sequence in context: A280821 A145143 A280378 * A164764 A333444 A274986

Adjacent sequences: A280711 A280712 A280713 * A280715 A280716 A280717

Keyword

nonn

Author

Jaroslav Krizek, Jan 07 2017

Status

approved