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A037028 Prime closest to e^n. 4
2, 3, 7, 19, 53, 149, 401, 1097, 2971, 8101, 22027, 59879, 162751, 442399, 1202603, 3269011, 8886109, 24154957, 65659969, 178482289, 485165237, 1318815713, 3584912833, 9744803443, 26489122147, 72004899319 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 0..500

MATHEMATICA

NextPrime[ n_Integer ] := Module[ {k = n + 1}, While[ ! PrimeQ[ k ], k++ ]; Return[ k ] ]; PrevPrime[ n_Integer ] := Module[ {k = n - 1}, While[ ! PrimeQ[ k ], k-- ]; Return[ k ] ]; Do[ a = Round[ N[ E^n ] ]; b = NextPrime[ Round[ N[ E^n ] ] - 1 ]; c = PrevPrime[ Round[ N[ E^n ] ] + 1 ]; If[ b - N[ E^n ] > N[ E^n ] - c, Print[ c ], Print[ b ] ], {n, 0, 25} ]

CROSSREFS

Sequence in context: A122724 A256758 A033844 * A052919 A005807 A167422

Adjacent sequences:  A037025 A037026 A037027 * A037029 A037030 A037031

KEYWORD

nonn

AUTHOR

G. L. Honaker, Jr.

EXTENSIONS

Corrected and extended by Robert G. Wilson v, Sep 16 2000

STATUS

approved

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Last modified May 23 12:38 EDT 2019. Contains 323514 sequences. (Running on oeis4.)