A131392 Positions of negative integers in A131389, minus 1.

3, 6, 7, 9, 12, 14, 15, 18, 20, 22, 23, 26, 27, 30, 31, 34, 36, 38, 40, 42, 43, 45, 48, 50, 52, 54, 55, 58, 60, 62, 64, 66, 67, 70, 71, 74, 76, 78, 80, 82, 84, 86, 87, 89, 91, 93, 96, 98, 100, 102, 104, 106, 107, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 131, 132

Offset

1,1

Comments

If A131389 is a permutation of the integers, as conjectured, then A131392 is the complement of A131391.

Links

Table of n, a(n) for n=1..65.

Formula

a(n) = -1 + position of the n-th negative integer in the sequence A131389=(0,1,2,-1,3,4,-2,-3,6,-4,5,...)

Example

The 5th negative integer to occur in A131391 is -5, which occurs in position 13, so that a(5)=13-1=12.

Crossrefs

Cf. A131388, A131389, A131390, A131391, A131393, A131394, A131395, A131396, A131397.

Sequence in context: A083951 A284879 A208327 * A131397 A176409 A284473

Adjacent sequences: A131389 A131390 A131391 * A131393 A131394 A131395

Keyword

nonn

Author

Clark Kimberling, Jul 06 2007

Status

approved