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 A051276 Nonzero coefficients in one of the 5-adic expansions of sqrt(-1). 0
 2, 1, 2, 1, 3, 4, 2, 3, 3, 2, 2, 4, 1, 3, 2, 4, 4, 3, 4, 4, 1, 2, 4, 1, 4, 1, 1, 3, 1, 4, 1, 4, 2, 1, 1, 3, 3, 2, 2, 4, 4, 2, 4, 3, 1, 2, 4, 3, 3, 3, 3, 1, 3, 1, 1, 3, 3, 4, 1, 3, 3, 3, 4, 2, 2, 2, 1, 4, 1, 1, 4, 4, 2, 1, 2, 3, 4, 4, 4, 2, 2, 1, 3, 1, 3, 2, 4, 2, 1, 4, 3, 4, 3, 1, 2, 1, 3, 3, 3, 1, 1, 3, 1, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 REFERENCES Kurt Mahler, Introduction to p-adic numbers and their functions. Cambridge Tracts in Mathematics, 76. Cambridge University Press, Cambridge-New York, 1971. See pp. 35ff. LINKS EXAMPLE 2 + 1*5 + 2*5^2 + 1*5^3 + 3*5^4 + 4*5^5 + 2*5^6 + 3*5^7 + 3*5^9 + 2*5^10 + 2*5^11 + 4*5^13 + 1*5^14 + 3*5^15 + 2*5^16 + 4*5^17 + 4*5^19 + ... MAPLE R:= select(t -> padic:-ratvaluep(t, 1)=2, [padic:-rootp(x^2+1, 5, 200)]): subs(0=NULL, op([1, 1, 3], R)); # Robert Israel, Mar 04 2016 PROG (PARI) sqrt(-1+O(5^100)) CROSSREFS Cf. A034935, A048898, A048899, A210850, A210851. Sequence in context: A322826 A133117 A210850 * A226212 A233439 A256600 Adjacent sequences:  A051273 A051274 A051275 * A051277 A051278 A051279 KEYWORD nonn,easy,nice AUTHOR EXTENSIONS More terms from Antonio G. Astudillo (afg_astudillo(AT)hotmail.com) and Jason Earls, Jun 15 2001 Name corrected by Robert Israel at suggestion of Wolfdieter Lang, Mar 04 2016 STATUS approved

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Last modified October 22 18:00 EDT 2019. Contains 328319 sequences. (Running on oeis4.)