The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A034974 Number of divisors of binomial(n, floor(n/2)), the terms of A001405. 12
 1, 2, 2, 4, 4, 6, 4, 8, 12, 18, 16, 24, 24, 32, 24, 48, 32, 48, 32, 48, 96, 128, 64, 96, 144, 192, 288, 384, 384, 480, 192, 384, 512, 768, 768, 1152, 1152, 1536, 1536, 2304, 1536, 2048, 1536, 2048, 3072, 3840, 2304, 3456, 3456, 4608, 4608, 6144, 3072, 3840, 6144 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A000005(A001405(n)). - Michel Marcus, Feb 25 2014 EXAMPLE a(59) = d(C(59,29)) = d(59132290782430712) = 8192 = 4*2^11. MATHEMATICA Table[DivisorSigma[0, Binomial[n, Floor[n/2]]], {n, 60}] (* Harvey P. Dale, Jun 12 2012 *) PROG (PARI) a(n) = numdiv(binomial(n, n\2)); \\ Michel Marcus, Feb 25 2014 CROSSREFS Cf. A001405, A034973. Sequence in context: A023817 A300754 A145392 * A048275 A211508 A109874 Adjacent sequences:  A034971 A034972 A034973 * A034975 A034976 A034977 KEYWORD nonn AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 18 12:10 EST 2020. Contains 332018 sequences. (Running on oeis4.)