A337375 a(n) = A330749(A005940(1+n)).

1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 2, 1, 2, 1, 1, 1, 1, 1, 1, 5, 6, 3, 2, 1, 1, 3, 4, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 7, 5, 15, 6, 5, 6, 3, 2, 1, 1, 1, 1, 5, 6, 9, 4, 1, 1, 3, 4, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 2, 1, 2, 1, 1, 11, 7, 7, 5, 35, 30, 15, 6, 7, 5, 15, 12, 5, 6, 3, 2, 1, 1, 1, 1, 1, 2, 1, 1, 7, 5

Offset

0,6

Links

Antti Karttunen, Table of n, a(n) for n = 0..16383

Index entries for sequences related to binary expansion of n

Formula

a(n) = A330749(A005940(1+n)).

Prog

(PARI)
A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); (t); };
A064989(n) = {my(f); f = factor(n); if((n>1 && f[1, 1]==2), f[1, 2] = 0); for (i=1, #f~, f[i, 1] = precprime(f[i, 1]-1)); factorback(f)};
A330749(n) = gcd(n, A064989(n));
A337375(n) = A330749(A005940(1+n));

Crossrefs

Cf. A005940, A064989, A330749, A337376, A337377.

Sequence in context: A124010 A212171 A337255 * A196228 A133364 A063420

Adjacent sequences: A337372 A337373 A337374 * A337376 A337377 A337378

Keyword

nonn

Author

Antti Karttunen, Sep 11 2020

Status

approved