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A107055 Integer part of Sum_{k>=0} Sum_{j=0..k} n^j*A107045(k,j)/A107046(k,j). 0
1, 2, 4, 8, 14, 23, 37, 60, 94, 147, 227, 349, 533, 810, 1225, 1847, 2776, 4162, 6224, 9288, 13836, 20575, 30552, 45305, 67100, 99267, 146703, 216602, 319525, 470974, 693685, 1020998, 1501775, 2207604, 3243324, 4762421, 6989521, 10253264 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Limit a(n+1)/a(n) exists and is conjectured to equal exp(exp(-1)).

LINKS

Table of n, a(n) for n=1..38.

FORMULA

n^p = Sum_{k=0..n} p^k*Sum_{j=0..k} n^j*A107045(k, j)/A107046(k, j) for all nonnegative integers n and p.

PROG

(PARI) {a(n)=floor(sum(k=0, n+10, sum(j=0, k, n^j*(matrix(k+1, k+1, r, c, if(r>=c, 1.*(r-1)^(c-1)))^-1)[k+1, j+1])))}

CROSSREFS

Cf. A107045/A107046, A107047/A107048 (n=2), A107049/A107050 (n=3), A107051/A107052 (n=4), A107053/A107054 (n=5).

Sequence in context: A089054 A055291 A091773 * A202840 A018153 A101687

Adjacent sequences:  A107052 A107053 A107054 * A107056 A107057 A107058

KEYWORD

nonn

AUTHOR

Paul D. Hanna, May 17 2005

STATUS

approved

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Last modified December 8 17:01 EST 2021. Contains 349596 sequences. (Running on oeis4.)