

A334083


Integers m such that all binomial coefficients C(m,k), with 0<=k<=m, are practical numbers.


2




OFFSET

1,2


COMMENTS

Integers m such that A334082(m) = 0.
All terms are powers of 2, but this is not a sufficient condition since A334082(8) = 1.


LINKS

Table of n, a(n) for n=1..9.


PROG

(PARI) isok(n) = sum(k=0, n, !is_A005153(binomial(n, k))) == 0;


CROSSREFS

Cf. A005153 (practical numbers), A007318 (binomial coefficients).
Cf. A334082, A334084.
Sequence in context: A036345 A032464 A171381 * A274497 A145119 A081411
Adjacent sequences: A334080 A334081 A334082 * A334084 A334085 A334086


KEYWORD

nonn,more


AUTHOR

Michel Marcus, Apr 14 2020


EXTENSIONS

a(9) from Jinyuan Wang, Apr 14 2020


STATUS

approved



