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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
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 * A355313 A354474 A081647
KEYWORD
nonn
AUTHOR
Klaus Brockhaus, Apr 02 2010
STATUS
approved

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Last modified March 3 00:46 EST 2024. Contains 370499 sequences. (Running on oeis4.)