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A018849 Strobogrammatic squares: the same upside down (calculator-style numerals). 2
0, 1, 121, 6889, 10201, 69169, 1002001, 5221225, 100020001, 109181601, 522808225, 602555209, 10000200001, 62188888129, 1000002000001, 1212225222121, 100000020000001, 10000000200000001, 10022212521222001, 12102202520220121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Subsequence of squares in A018846. - Michel Marcus, Aug 04 2014

LINKS

Table of n, a(n) for n=1..20.

PROG

(PARI) is_A018846(n, t=Vec("012..59.86"))={ apply(x->t[eval(x)+1], n=Vec(Str(n)))==vecextract(n, "-1..1"); }

lista(nn) = {for(n=0, nn, if (is_A018846(n^2), print1(n^2, ", "))); } \\ Michel Marcus, Aug 04 2014

CROSSREFS

Sequence in context: A231649 A212802 A272775 * A011814 A238320 A144766

Adjacent sequences:  A018846 A018847 A018848 * A018850 A018851 A018852

KEYWORD

nonn,base

AUTHOR

David W. Wilson

STATUS

approved

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Last modified January 15 18:14 EST 2019. Contains 319153 sequences. (Running on oeis4.)