cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-3 of 3 results.

A080295 A014486-index of the branch-reduced binomial-mod-2 binary trees.

Original entry on oeis.org

1, 6, 477, 70818, 2208159610, 445557105328, 19185898282602827, 905428099582719818595
Offset: 0

Views

Author

Antti Karttunen, Mar 02 2003

Keywords

Crossrefs

Cf. A014486, A080265, A080293, A080296, A080300, A080320, A080979.

Formula

a(n) = A080298(A080265(n)).
a(n) = A080979(A080265(2*n)).
a(n) = A080300(A080293(n)).

A080321 a(n) = A080301(A080318(n)).

Original entry on oeis.org

0, 4, 428, 58747, 1758473969, 340760636747, 14410746502617904, 673020037180959760871, 1736622037158911219053381734718, 400539731185759177060380684246324
Offset: 0

Views

Author

Antti Karttunen, Mar 02 2003

Keywords

Crossrefs

Cf. A080320.

A080231 Engel expansion for (negative) constant defined in A078756.

Original entry on oeis.org

-1, -2, -3, -4, -9, -11, -17, -82, -86, -89, -259, -1031, -1493, -3088, -18107, -3128320, -4245574, -4430458, -6692218, -6908807, -20282631, -55597679, -73203786, -80410013, -92821351, -192936649, -5039379072, -30234138756, -55272287466, -202248991637
Offset: 1

Views

Author

Jon Perry, Feb 08 2003

Keywords

Crossrefs

Cf. A006784, A078756, A080320.

Programs

  • PARI
    x=vector(31); a=vector(30); x[1]=-0.62923321313860758778445822033246963679442280615921 for (i=1,30,a[i]=ceil(1/x[i]); x[i+1]=x[i]*a[i]-1); x

Formula

See A006784 for definition of Engel expansion
Showing 1-3 of 3 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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