A211022 - OEIS

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A211022

Value on the axis "y" of the center of the n-th circle formed in the structure of A211000.

-6, -4, -2, 0, 2, 6, 8, 4, -10, -12, -8, 10, 12, 14, 16, 20, 22, 24, 26, 30, 32, 34, 36, 28, 38, 40, 42, 46, 48, 52, 56, 58, 60, 62, 54, 50, 44, 64, 66, 68, 18, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 102, 106, 104, 100

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The structure of A211000 looks like essentially a column of tangent circles of radius 1. The structure arises from the prime numbers A000040. Values on the axis "x" are equal to 3.

LINKS

Table of n, a(n) for n=1..60.

CROSSREFS

Cf. A187210, A211000, A211001-A211003, A211010, A211011, A211020, A211021, A211023, A211024.

Sequence in context: A362202 A132870 A117254 * A021613 A157701 A193076

Adjacent sequences: A211019 A211020 A211021 * A211023 A211024 A211025

KEYWORD

sign

AUTHOR

Omar E. Pol, Mar 31 2012

STATUS

approved