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A248735
Number of digits in the decimal expansion of the number of partitions of 7^n.
5
1, 2, 6, 18, 51, 140, 377, 1005, 2668, 7069, 18714, 49527, 131052, 346746, 917422, 2427289
OFFSET
0,2
FORMULA
a(n) = A055642(A248734(n)). - R. J. Mathar, Nov 17 2014
MATHEMATICA
f[n_] := Floor[ Log[10, PartitionsP[ 7^n]] + 1]; Table[ f@n, {n, 0, 15}]
IntegerLength[PartitionsP[7^#]]&/@Range[0, 15] (* Harvey P. Dale, Apr 27 2015 *)
PROG
(Magma) [Floor(Log(10, (NumberOfPartitions(7^n))))+1: n in [0..6]]; // Vincenzo Librandi, Oct 13 2014
(PARI) a(n) = #Str(numbpart(7^n)); \\ Michel Marcus, Oct 16 2014
KEYWORD
nonn,base,more
AUTHOR
Robert G. Wilson v, Oct 12 2014
STATUS
approved