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A023420 a(n) = c([ n/2 ]) + c([ n/3 ]) + ... + c([ n/n ]) for n >=3, where a(1) = 1, a(2) = 3 and c(n) = n-th number not in sequence a( ). 0
1, 3, 4, 9, 11, 17, 19, 25, 28, 34, 36, 45, 47, 54, 58, 65, 67, 76, 78, 86, 91, 97, 99, 111, 114, 121, 125, 134, 136, 147, 149, 157, 161, 167, 172, 186, 188, 194, 199, 210, 212, 224, 226, 234, 240, 246, 248, 262, 266, 275, 279, 289, 291, 303, 307 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..55.

CROSSREFS

Sequence in context: A091380 A050006 A176744 * A004657 A054075 A062798

Adjacent sequences:  A023417 A023418 A023419 * A023421 A023422 A023423

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 24 21:22 EST 2018. Contains 299628 sequences. (Running on oeis4.)