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A304092 Number of Lucas numbers (A000032: 2, 1, 3, 4, 7, 11, ...) dividing n. 4
1, 2, 2, 3, 1, 3, 2, 3, 2, 2, 2, 4, 1, 3, 2, 3, 1, 4, 1, 3, 3, 3, 1, 4, 1, 2, 2, 4, 2, 3, 1, 3, 3, 2, 2, 5, 1, 2, 2, 3, 1, 4, 1, 4, 2, 2, 2, 4, 2, 2, 2, 3, 1, 4, 2, 4, 2, 3, 1, 4, 1, 2, 3, 3, 1, 4, 1, 3, 2, 3, 1, 5, 1, 2, 2, 4, 3, 3, 1, 3, 2, 2, 1, 5, 1, 2, 3, 4, 1, 4, 2, 3, 2, 3, 1, 4, 1, 3, 3, 3, 1, 3, 1, 3, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..65537

FORMULA

a(n) = Sum_{d|n} A102460(d).

a(n) = A304091(n) + A102460(n).

a(n) = A304094(n) + A059841(n) = A304096(n) + A059841(n) + A079978(n) + 1.

PROG

(PARI)

A102460(n) = { my(u1=1, u2=3, old_u1); if(n<=2, sign(n), while(n>u2, old_u1=u1; u1=u2; u2=old_u1+u2); (u2==n)); };

A304092(n) = sumdiv(n, d, A102460(d));

CROSSREFS

Cf. A000032, A102460, A304091, A304094, A304096.

Cf. also A005086, A300837.

Sequence in context: A144911 A233431 A160650 * A171691 A088904 A241568

Adjacent sequences:  A304089 A304090 A304091 * A304093 A304094 A304095

KEYWORD

nonn

AUTHOR

Antti Karttunen, May 13 2018

STATUS

approved

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Last modified June 6 11:14 EDT 2020. Contains 334827 sequences. (Running on oeis4.)