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A199297
Binomial transform of A090426.
0
1, 3, 13, 59, 257, 1088, 4547, 18906, 78448, 325210, 1347552, 5582415, 23122986, 95771842, 396659584, 1642825239, 6803957409, 28179306468, 116707377067, 483354745392, 2001859113304, 8290886288280, 34337476313478, 142211844759126, 588983541662827
OFFSET
1,2
COMMENTS
a(n)/a(n-1) tends to Pi + 1; e.g., a(21)/a(20) = 4.1415939998...; whereas A090426(n)/A090426(n-1) tends to Pi.
MATHEMATICA
r = 25; s = Join[{0, 1}, Table[Floor[Pi^(n + 1)/(Pi^2 + 1)], {n, 2, r}]]; t = Table[Sum[Binomial[n, k]*s[[k + 1]], {k, n}], {n, 0, r}]; Table[t[[n + 1]] - t[[n]], {n, r}] (* Arkadiusz Wesolowski, Jun 01 2013 *)
CROSSREFS
Cf. A090426.
Sequence in context: A339881 A336791 A268596 * A152594 A052984 A360143
KEYWORD
nonn
AUTHOR
STATUS
approved