A365628 - OEIS

A365628

a(n) = binomial(primorial(n), n).

1, 2, 15, 4060, 78738660, 545754554499462, 1018081517447240182211275, 1793004475784081302284255717158418120, 1943305407393725342965469143054357602760779899437185, 3772316402417100592416011698371929155605067111502494326520988270728160

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

FORMULA

a(n) = binomial(A002110(n), n).

PROG

(Python)

from sympy import binomial, primorial

a = lambda n: binomial(primorial(n), n)

print([a(n) for n in range(1, 10)])

(PARI) a(n) = binomial(vecprod(primes(n)), n); \\ Michel Marcus, Sep 14 2023

CROSSREFS

Cf. A002110, A007318, A014062, A060604, A086687.

Sequence in context: A320768 A337799 A064171 * A135085 A290042 A080911

Adjacent sequences: A365625 A365626 A365627 * A365629 A365630 A365631

KEYWORD

nonn

AUTHOR

Darío Clavijo, Sep 13 2023

STATUS

approved