id:A026233 - OEIS Search Results

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a(n) = j if n is the j-th prime, else a(n) = k if n is the k-th nonprime.

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1, 1, 2, 2, 3, 3, 4, 4, 5, 6, 5, 7, 6, 8, 9, 10, 7, 11, 8, 12, 13, 14, 9, 15, 16, 17, 18, 19, 10, 20, 11, 21, 22, 23, 24, 25, 12, 26, 27, 28, 13, 29, 14, 30, 31, 32, 15, 33, 34, 35, 36, 37, 16, 38, 39, 40, 41, 42, 17, 43, 18, 44, 45, 46, 47, 48 (list; graph; listen)

	OFFSET	`1,3`
	CROSSREFS	`Sequence in context: A079685 A112409 A026261 this_sequence A147954 A100679 A092982` `Adjacent sequences: A026230 A026231 A026232 this_sequence A026234 A026235 A026236`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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