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A077201 a(n) = n-th member in the sequence of numbers having the prime signature of n. 0
1, 3, 5, 49, 11, 22, 17, 16983563041, 529, 38, 31 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

a(p^r) = prime(p)^r, p is a prime.

LINKS

Table of n, a(n) for n=0..10.

EXAMPLE

a(4) = 49 as 4 = 2^2 = p^2 and the numbers of the form p^2 are 4,9,25,49,121,... and 49 is the 4th such number. a(6) = 22 = p*q, 22 is the 6th number in the sequence 6,10,14,15,21,22,26,...

CROSSREFS

Sequence in context: A227743 A235356 A120426 * A196467 A219506 A171775

Adjacent sequences:  A077198 A077199 A077200 * A077202 A077203 A077204

KEYWORD

more,nonn

AUTHOR

Amarnath Murthy, Nov 02 2002

STATUS

approved

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Last modified January 29 07:03 EST 2020. Contains 331337 sequences. (Running on oeis4.)