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A273148 Left inverse of A274648 2
0, 1, 4, 2, 164, 19, 3, 5, 16, 14, 12, 10, 8, 6, 8228, 28, 51, 26, 158, 24, 7, 9, 11, 13, 15, 17, 46, 90, 44, 88, 42, 86, 40, 84, 38, 82, 36, 80, 34, 78, 32, 147, 1975, 18, 22, 20, 255, 73, 1971, 71, 714, 69, 424, 67, 250, 65, 421, 63, 137, 61, 246, 59, 707 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

If A274648 is proved to be a permutation, then this is the full inverse of it.

LINKS

Benjamin Chaffin, Table of n, a(n) for n = 0..153

Benjamin Chaffin, Table of n, a(n) for n=0..1000000. This represents the inverse of the first 3.2*10^11 terms of A274468. The 33242 entries of -1 correspond to values which have not yet appeared. The first missing number is 154. The largest term in this range is a(4287)=257890387560.

FORMULA

a(n) = index of n in A274648; for all n >= 0, a(A274648(n)) = n.

EXAMPLE

A274468(19) = 5, so a(5) = 19.

CROSSREFS

Cf. A274648, A005132.

Sequence in context: A057167 A096683 A158903 * A276342 A152030 A072349

Adjacent sequences:  A273145 A273146 A273147 * A273149 A273150 A273151

KEYWORD

nonn

AUTHOR

Benjamin Chaffin, Oct 05 2016

STATUS

approved

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Last modified November 21 11:01 EST 2018. Contains 317447 sequences. (Running on oeis4.)