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A107821 Indices of primes occurring in A107801. 14
1, 9, 2, 6, 5, 7, 4, 12, 11, 8, 10, 17, 3, 16, 14, 13, 15, 19, 18, 20, 21, 22, 24, 23, 27, 26, 28, 25, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..61.

FORMULA

A107821(n)=pi(A107801(n))

CROSSREFS

Cf. A107801 - A107814, A107822, A107823, A107824, A107825, A107826, A107827, A107828, A107829, A107830, A107831, A107832, A107833, A107834.

Sequence in context: A155168 A239628 A160262 * A154162 A046019 A021523

Adjacent sequences:  A107818 A107819 A107820 * A107822 A107823 A107824

KEYWORD

easy,nonn

AUTHOR

Zak Seidov, May 24 2005

STATUS

approved

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Last modified October 20 22:44 EDT 2019. Contains 328291 sequences. (Running on oeis4.)