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A130602 A shell geometric model of the atomic nucleus. 11
11, 1111, 11, 111111, 11, 1111, 11111111, 1111, 11, 111111, 1111111111, 111111, 11, 1111, 11111111, 111111111111, 11111111, 1111, 11, 111111, 1111111111, 11111111111111, 1111111111, 111111, 11, 1111, 11111111, 111111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

11 is equal to 2 protons. 1111 is equal 2+2 protons. 111111 is equal 2+2+2 protons...

Repunit numbers represent the subshells.

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

See the model in the entry: A130517, A130556.

CROSSREFS

Cf. A056951, A130517, A130556.

Sequence in context: A191111 A127851 A135656 * A099814 A068053 A136308

Adjacent sequences:  A130599 A130600 A130601 * A130603 A130604 A130605

KEYWORD

nonn

AUTHOR

Omar E. Pol, Aug 10 2007, Aug 12 2007

STATUS

approved

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Last modified April 25 00:50 EDT 2014. Contains 240991 sequences.