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A305235 Smallest positive number k such that there are exactly n successive equal values of A001221 starting at k, i.e., such that A305234(k) = n. 1
1, 4, 3, 2, 54, 91, 142, 141, 44360, 48919, 218972, 526097, 526096, 526095, 17233173, 127890362 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

EXAMPLE

For n = 5: A001221(91+k) = 2 for k = 0..5 and 91 is the smallest number x with exactly 5 successors that have the same value of A001221 as x, so a(5) = 91.

PROG

(PARI) a305234(n) = my(k=n+1, i=0); while(omega(k)==omega(n), i++; k++); i

a(n) = my(k=1); while(1, if(a305234(k)==n, return(k)); k++)

CROSSREFS

Cf. A001221, A001274, A045983, A048932, A048971, A077657, A305234.

Sequence in context: A245348 A174551 A239799 * A120011 A177924 A200617

Adjacent sequences:  A305232 A305233 A305234 * A305236 A305237 A305238

KEYWORD

nonn,more

AUTHOR

Felix Fröhlich, May 28 2018

STATUS

approved

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Last modified August 9 14:23 EDT 2020. Contains 336323 sequences. (Running on oeis4.)