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A166018 Left edge of triangular table A138612. 1
1, 2, 3, 5, 6, 8, 9, 10, 13, 14, 16, 17, 18, 21, 22, 24, 25, 29, 30, 31, 32, 34, 36, 38, 40, 41, 44, 45, 47, 48, 51, 54, 55, 56, 58, 59, 62, 63, 65, 67, 69, 72, 73, 74, 75, 77, 80, 81, 83, 84, 87, 89, 92, 94, 96, 98, 99, 100, 102, 103, 104, 109, 110, 111, 113, 116, 118 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..67.

FORMULA

a(n) = A138612(A000124(n-1)).

CROSSREFS

Sequence in context: A167389 A288373 A087067 * A225745 A238896 A190842

Adjacent sequences:  A166015 A166016 A166017 * A166019 A166020 A166021

KEYWORD

nonn

AUTHOR

Antti Karttunen, Oct 05 2009

STATUS

approved

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Last modified November 21 06:00 EST 2019. Contains 329350 sequences. (Running on oeis4.)