Revision History for A231335
(Underlined text is an addition;
strikethrough text is a deletion.)
Showing entries 1-10
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#13 by Michael De Vlieger at Sat Sep 23 07:31:22 EDT 2023
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#12 by Joerg Arndt at Sat Sep 23 03:15:42 EDT 2023
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#11 by Michel Marcus at Sat Sep 23 01:53:36 EDT 2023
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#10 by Michel Marcus at Sat Sep 23 01:53:29 EDT 2023
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| DATA
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1, 1, 2, 2, 3, 3, 3, 4, 3, 3, 5, 4, 3, 4, 6, 4, 5, 4, 5, 6, 5, 4, 6, 7, 4, 5
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| PROG
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(PARI) isfib(n) = my(k=n^2); k+=(k+1)<<2; issquare(k) || issquare(k-8);
vf(v) = #select(isfib, Set(v));
lista(nn) = my(va=[0], vb=[1]); print1(vf(va), ", "); print1(vf(vb), ", "); for (n=2, nn, v = vector(2^(n-1), k, j=(k+1)\2; i=(j+1)\2; y=vb[j]; x=va[i]; if (k%2, y+x, 3*y-x)); print1(vf(v), ", "); va = vb; vb = v; ); \\ Michel Marcus, Sep 23 2023
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| EXTENSIONS
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a(19)-a(25) from Michel Marcus, Sep 23 2023
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| STATUS
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approved
editing
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#9 by Wesley Ivan Hurt at Sat Mar 18 22:56:46 EDT 2023
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#8 by Wesley Ivan Hurt at Sat Mar 18 22:56:13 EDT 2023
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#7 by Wesley Ivan Hurt at Sat Mar 18 22:55:27 EDT 2023
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#6 by Wesley Ivan Hurt at Sat Mar 18 22:53:38 EDT 2023
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#5 by Reinhard Zumkeller at Fri Nov 08 03:40:18 EST 2013
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#4 by Reinhard Zumkeller at Fri Nov 08 02:13:07 EST 2013
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| DATA
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1, 1, 2, 2, 3, 3, 3, 4, 3, 3, 5, 4, 3, 4, 6, 4, 5, 4, 5
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