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A116472 a(n) = floor(exp(2*n)). 2
1, 7, 54, 403, 2980, 22026, 162754, 1202604, 8886110, 65659969, 485165195, 3584912846, 26489122129, 195729609428, 1446257064291, 10686474581524, 78962960182680, 583461742527454, 4311231547115195, 31855931757113756, 235385266837019985, 1739274941520501047 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

A bisection of A000149, which is the main entry for this sequence.

a(n) = A000149(2*n).

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..100

MATHEMATICA

Floor[Exp[2Range[0, 30]]] (* Harvey P. Dale, Aug 22 2011 *)

PROG

(MAGMA) [Floor(Exp(2*n)): n in [0..25]]; // Vincenzo Librandi, Aug 23 2011

(PARI) a(n)=exp(2*n)\1 \\ Charles R Greathouse IV, Aug 23 2011

(Haskell)

a116472 = a000149 . (* 2)  -- Reinhard Zumkeller, Mar 17 2015

CROSSREFS

Cf. A000149.

Sequence in context: A203289 A204258 A081008 * A015562 A243670 A152108

Adjacent sequences:  A116469 A116470 A116471 * A116473 A116474 A116475

KEYWORD

nonn

AUTHOR

Milton L. Brown (miltbrown(AT)earthlink.net), Jan 20 2008

EXTENSIONS

More terms from Harvey P. Dale, Aug 22 2011

STATUS

approved

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Last modified March 4 02:35 EST 2021. Contains 341773 sequences. (Running on oeis4.)