login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A119380
Remainder when the integer part of e^n is divided by the n-th prime number.
1
0, 1, 0, 5, 5, 0, 8, 16, 7, 15, 13, 28, 23, 23, 26, 24, 57, 57, 62, 43, 70, 49, 36, 64, 84, 3, 4, 64, 83, 103, 45, 53, 49, 37, 26, 19, 75, 20, 147, 20, 134, 73, 56, 17, 31, 89, 143, 200, 103, 170, 25, 37, 159, 181, 90, 242, 16, 93, 222, 163, 57, 132, 214, 71, 164, 57, 62, 14
OFFSET
1,4
FORMULA
a(n) = floor(e^n) mod prime(n).
EXAMPLE
The sixth term is 0 because e^6 is 403.42879... and 403 is a multiple of 13, the sixth prime.
MAPLE
A119380:=n->floor(exp(1)^n) mod ithprime(n): seq(A119380(n), n=1..100); # Wesley Ivan Hurt, Nov 30 2017
MATHEMATICA
Table[Mod[Floor[E^n], Prime[n]], {n, 1, 100}] (* Stefan Steinerberger, Jul 26 2006 *)
PROG
(PARI) a(n) = floor(exp(n))%prime(n) \\ Iain Fox, Nov 30 2017
CROSSREFS
Cf. A000149.
Sequence in context: A200516 A233383 A144184 * A121212 A182787 A133337
KEYWORD
easy,nonn,less
AUTHOR
Axel Harvey, Jul 24 2006
EXTENSIONS
More terms from Stefan Steinerberger, Jul 26 2006
STATUS
approved