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A069841 A036937(n) - 222...2 (with n 2s). 2
0, 1, 1, 7, 15, 5, 7, 1, 47, 21, 1, 61, 5, 13, 51, 41, 29, 29, 31, 19, 33, 7, 13, 31, 19, 67, 27, 93, 25, 43, 9, 49, 5, 81, 67, 1, 91, 21, 121, 81, 15, 149, 19, 161, 23, 119, 25, 107, 117, 43, 9, 117, 13, 85, 55, 131, 9, 7, 57, 17, 145, 73, 17, 301, 305, 157, 341 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Values of k arising from Mathematica calculation of A036937.

LINKS

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

Robert G. Wilson v, Comments and first 121 terms

MATHEMATICA

Do[p = 2(10^n - 1)/9; k = 0; While[ ! PrimeQ[p], k++; p = FromDigits[ PadLeft[ IntegerDigits[k, 2], n] + 2]]; Print[p], {n, 1, 30}]

CROSSREFS

Cf. A036937.

Sequence in context: A213151 A225763 A070407 * A289940 A290065 A289932

Adjacent sequences:  A069838 A069839 A069840 * A069842 A069843 A069844

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, May 03 2002

STATUS

approved

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Last modified February 18 21:20 EST 2020. Contains 332028 sequences. (Running on oeis4.)