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A334083 Integers m such that all binomial coefficients C(m,k), with 0<=k<=m, are practical numbers. 2
1, 2, 4, 16, 32, 64, 128, 256, 1024 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 6 14:43 EST 2022. Contains 358644 sequences. (Running on oeis4.)