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A174928 Partial sums of A174927. 2
1, 65, 66, 130, 131, 195, 196, 260, 261, 325, 326, 390, 391, 455, 456, 520, 521, 585, 586, 650, 651, 715, 716, 780, 781, 845, 846, 910, 911, 975, 976, 1040, 1041, 1105, 1106, 1170, 1171, 1235, 1236, 1300, 1301, 1365, 1366, 1430, 1431, 1495, 1496, 1560 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

First differences of A174929.

LINKS

Table of n, a(n) for n=0..47.

FORMULA

a(n) = (67+130*n-63*(-1)^n)/4.

a(n) = a(n-2)+65 for n > 1; a(0) = 1, a(1) = 65.

a(n) = ((n+1) mod 2) + 65*floor((n+1)/2).

G.f.: (1+64*x)/((1-x)^2*(1+x)).

PROG

(MAGMA) T:=&cat[ [1, 64]: n in [0..23] ]; [ n eq 1 select T[1] else Self(n-1)+T[n]: n in [1..#T] ];

[ n le 2 select 64*n-63 else Self(n-2)+65: n in [1..48] ];

CROSSREFS

Cf. A174927 (repeat 1, 64), A174929.

Sequence in context: A043625 A296877 A044875 * A081647 A257444 A045025

Adjacent sequences:  A174925 A174926 A174927 * A174929 A174930 A174931

KEYWORD

nonn

AUTHOR

Klaus Brockhaus, Apr 02 2010

STATUS

approved

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Last modified September 23 18:00 EDT 2021. Contains 347617 sequences. (Running on oeis4.)