A064406 Partial sums of A064405.

-1, -3, -4, -8, -7, -9, -10, -18, -13, -11, -8, -12, -7, -9, -10, -26, -13, -3, 8, 12, 25, 31, 38, 30, 47, 57, 68, 64, 77, 75, 74, 42, 71, 97, 124, 144, 173, 195, 218, 226, 259, 285, 312, 324, 353, 367, 382, 366, 407, 441, 476, 496, 533, 555, 578, 570, 611, 637, 664, 660, 689, 687, 686, 622, 683, 741, 800, 852, 913, 967

Offset

0,2

Comments

Previous name was: The accumulation of the number of even entries (A048967) over the number of odd entries (A001316) in row n of Pascal's triangle (A007318).

References

Tony Colledge, "Pascal's Triangle, A teacher's guide with blackline masters," Tarquin Publications, Norfolk, England, Second Edition, 1997, page 9.

Links

Table of n, a(n) for n=0..69.

Mathematica

a[ n_ ] := n + 1 - 2*Sum[ Mod[ Binomial[ n, k ], 2 ], {k, 0, n} ];
Table[ Sum[ a[ k ], {k, 0, n} ], {n, 0, 100} ]

Crossrefs

Partial sums of A064405.

Sequence in context: A255700 A255697 A019972 * A299068 A344867 A049826

Adjacent sequences: A064403 A064404 A064405 * A064407 A064408 A064409

Keyword

easy,sign

Author

Robert G. Wilson v, Sep 29 2001

Extensions

New name from Sean A. Irvine, Jul 05 2023

Status

approved