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A089539 a(n) is the least semiprime > n!. 5
4, 4, 9, 25, 121, 721, 5041, 40321, 362885, 3628801, 39916803, 479001617, 6227020801, 87178291201, 1307674368007, 20922789888002, 355687428096003, 6402373705728023, 121645100408832001, 2432902008176640001, 51090942171709440011, 1124000727777607680029, 25852016738884976640003 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

FORMULA

a(n) = n! + A085747(n).

CROSSREFS

Cf. A001358, A085747, A089538, A089540, A089541, A089542.

Sequence in context: A334009 A069549 A118069 * A324010 A117416 A174943

Adjacent sequences:  A089536 A089537 A089538 * A089540 A089541 A089542

KEYWORD

nonn

AUTHOR

Ray Chandler, Nov 09 2003

EXTENSIONS

Better name, more terms from Jinyuan Wang, Jul 31 2021

STATUS

approved

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Last modified September 18 01:39 EDT 2021. Contains 347504 sequences. (Running on oeis4.)