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A175462 Number of divisors of integers of form 5 + 8n. 1
2, 2, 4, 2, 2, 6, 2, 2, 4, 4, 4, 4, 2, 2, 6, 4, 4, 4, 2, 2, 8, 2, 2, 8, 2, 4, 4, 4, 2, 4, 6, 4, 6, 2, 2, 8, 2, 4, 4, 2, 6, 6, 4, 2, 8, 4, 2, 4, 2, 2, 10, 4, 2, 8, 4, 4, 4, 2, 4, 6, 4, 4, 4, 2, 4, 12, 4, 2, 6, 2, 4, 4, 4, 4, 4, 6, 2, 8, 4, 6, 8, 2, 2, 4, 2, 4, 12, 2, 2, 4, 6, 2, 8, 4, 2, 12, 2, 4, 4, 2, 8, 4, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

All terms are even.

LINKS

Table of n, a(n) for n=0..102.

FORMULA

a(n) = d(5 + 8n), n = 0, 1, 2, ...

a(n) = A000005(A004770(n)).

PROG

(PARI) a(n) = numdiv(5+8*n); \\ Michel Marcus, Oct 15 2013

CROSSREFS

Cf. A004770 Numbers of form 8n + 5, A007521 Primes of form 8n + 5. A000005 d(n) : number of divisors of n.

Sequence in context: A213431 A261891 A321320 * A133946 A286250 A278244

Adjacent sequences:  A175459 A175460 A175461 * A175463 A175464 A175465

KEYWORD

nonn

AUTHOR

Zak Seidov, May 23 2010

STATUS

approved

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Last modified July 17 08:42 EDT 2019. Contains 325098 sequences. (Running on oeis4.)