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A177268 a(n) = the smallest positive integer not yet occurring such that the number of divisors of 1+sum{k=1 to n} a(k) is exactly n. 1
1, 2, 4, 8, 12, 36, 6, 30, 62, 862, 11, 3061, 4096, 8192, 17, 49135, 60, 196548, 48, 977, 6143, 3924992, 21, 283131, 15856, 5329, 111, 263936704, 1744, 805304624, 10, 14730230, 670720, 18082841, 50, 67612251061, 786432, 99913728, 80 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

It seems possible that this is a permutation of the positive integers. Is it?

This is analogous to A175350(n) with a(1)=a(2)=1.

1 + sum{k=1 to n} a(k) = A177269(n).

LINKS

Table of n, a(n) for n=2..40.

CROSSREFS

Cf. A175350, A177269

Sequence in context: A105207 A202148 A215825 * A242924 A133802 A076202

Adjacent sequences:  A177265 A177266 A177267 * A177269 A177270 A177271

KEYWORD

nonn

AUTHOR

Hugo van der Sanden, May 06 2010

STATUS

approved

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Last modified June 26 02:24 EDT 2017. Contains 288749 sequences.