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URL: https://oeis.org/A076878

⇱ A076878 - OEIS

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A076878
a(n) = ceiling(n^(1/n))^n - n.
0
0, 2, 5, 12, 27, 58, 121, 248, 503, 1014, 2037, 4084, 8179, 16370, 32753, 65520, 131055, 262126, 524269, 1048556, 2097131, 4194282, 8388585, 16777192, 33554407, 67108838, 134217701, 268435428, 536870883, 1073741794, 2147483617
OFFSET
1,2
FORMULA
a(1)=0; a(n) = 2^n - n for n > 1. - Benoit Cloitre, Nov 28 2002
MAPLE
a:=n->sum(binomial(n, k)+binomial(k, n), k=2..n): seq(a(n), n=1..31); # Zerinvary Lajos, Apr 29 2007
MATHEMATICA
Table[Ceiling[n^(1/n)]^n-n, {n, 1, 30}]
CROSSREFS
Same as A000325 except for the first term.
Sequence in context: A328882 A362197 A000325 * A129983 A307265 A083378
KEYWORD
nonn
AUTHOR
Joseph L. Pe, Nov 25 2002
STATUS
approved