A008461 - OEIS

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A008461

Take sum of squares of digits of previous term.

3

7, 49, 97, 130, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..94.

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

MATHEMATICA

NestList[Total[IntegerDigits[#]^2]&, 7, 100] (* Harvey P. Dale, Mar 12 2014 *)

CROSSREFS

Sequence in context: A230655 A357302 A343771 * A043131 A082701 A044145

Adjacent sequences: A008458 A008459 A008460 * A008462 A008463 A008464

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane.

STATUS

approved