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 A186192 First digit of pentanacci numbers A000322. 2
 1, 1, 1, 1, 1, 5, 9, 1, 3, 6, 1, 2, 4, 9, 1, 3, 7, 1, 2, 5, 1, 2, 4, 8, 1, 3, 6, 1, 2, 4, 9, 1, 3, 7, 1, 2, 5, 1, 2, 4, 8, 1, 3, 6, 1, 2, 4, 9, 1, 3, 7, 1, 2, 5, 1, 2, 4, 8, 1, 3, 6, 1, 2, 4, 9, 1, 3, 6, 1, 2, 5, 1, 2, 4, 7, 1, 3, 6, 1, 2, 4, 8, 1, 3, 6, 1, 2, 5, 1, 2, 3, 7, 1, 2, 5, 1, 2, 4, 8, 1, 3, 6, 1, 2, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 COMMENTS Sequence obeys Benford law about distribution of first digits in a sequence P(n)=Log(1+1/n). LINKS Indranil Ghosh, Table of n, a(n) for n = 1..10000 EXAMPLE a(15)=1 since Penta(15)=1921. MATHEMATICA t = {1, 1, 1, 1, 1}; Do[AppendTo[t, t[[-1]] + t[[-2]] + t[[-3]] + t[[-4]] + t[[-5]]], {100}]; Table[IntegerDigits[i][[1]], {i, t}] First[IntegerDigits[#]]&/@LinearRecurrence[{1, 1, 1, 1, 1}, {1, 1, 1, 1, 1}, 110] (* Harvey P. Dale, Mar 28 2013 *) CROSSREFS Cf. A000322. Sequence in context: A188616 A274418 A127414 * A231532 A086201 A010490 Adjacent sequences:  A186189 A186190 A186191 * A186193 A186194 A186195 KEYWORD nonn,base AUTHOR Carmine Suriano, Feb 14 2011 STATUS approved

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Last modified May 8 07:02 EDT 2021. Contains 343653 sequences. (Running on oeis4.)