A344013 -id:A344013 - cp's OEIS frontend

A345240 a(1) = 1; thereafter a(n) = A161406(a(n-1)).

1, 52, 158, 229, 278, 284, 304, 235, 289, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298, 291, 300, 153, 251, 298

Offset: 1

Omar E. Pol and N. J. A. Sloane, Jun 11 2021

A Spanish analog of A345126 (British English) and A345157 (US English).

Starting from n = 10 the sequence becomes periodic with period 5: repeat [291, 300, 153, 251, 298].

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,1).

Cf. A073327, A161406, A169639, A344013, A345126, A345157.

a[1]=1;a[n_]:=a[n]=Total[If[#=="ñ",15,If[(s=LetterNumber@#)>14,s+1,s]]&/@Characters@StringDelete[IntegerName[a[n-1],"Spanish"],{" ","-"}]];Array[a,100] (* Giorgos Kalogeropoulos, Jun 11 2021 *)
PadRight[{1,52,158,229,278,284,304,235,289},120,{300,153,251,298,291}] (* Harvey P. Dale, Sep 26 2024 *)

cp's OEIS Frontend

A345240 a(1) = 1; thereafter a(n) = A161406(a(n-1)).

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