OFFSET
1,1
LINKS
Sean A. Irvine, Table of n, a(n) for n = 1..18
EXAMPLE
Pairs (n, k) such that Eulerian(n, k) is prime are (4, 2), (10, 2), (8, 4), (14, 2), (16, 2), (12, 3), (15, 3), (26, 2), (50, 2), (56, 2), (70, 2), (51, 3), (27, 9), (72, 3), (116, 2), (87, 3), (183, 3).
PROG
(PARI) Eulerian(n, k)=sum(j=0, k, (-1)^j*(k-j)^n*binomial(n+1, j));
lista(nn) = {my(list=List()); for (n=1, nn, for (k=1, n, if (ispseudoprime(p=Eulerian(n, k)), listput(list, p)); ); ); Vec(Set(list)); } \\ Michel Marcus, May 25 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Henry Bottomley, Nov 06 2001
EXTENSIONS
More terms from Randall L Rathbun, Jan 21 2002
STATUS
approved