OFFSET
0,3
COMMENTS
See A293207 for the corresponding sequence b, and additional comments.
LINKS
Rémy Sigrist, Table of n, a(n) for n = 0..59999
Rémy Sigrist, PARI program for A293208
EXAMPLE
f(0) = 0, and a(0) = 0.
f(2) = f(1) + (i^1) * A293207(1) = 0 + (i) * 1 = i, and a(1) = 0.
f(3) = f(2) + (i^2) * A293207(2) = i + (-1) * 2 = -2 + i, and a(2) = -2.
f(4) = f(3) + (i^3) * A293207(3) = -2 + i + (-i) * 3 = -2 - 2*i, and a(3) = -2.
f(5) = f(4) + (i^4) * A293207(4) = -2 - 2*i + (1) * 1 = -1 - 2*i, and a(4) = -1.
f(6) = f(5) + (i^5) * A293207(5) = -1 - 2*i + (i) * 2 = -1, and a(5) = -1.
f(7) = f(6) + (i^6) * A293207(6) = -1 + (-1) * 3 = -4, and a(6) = -4.
f(8) = f(7) + (i^7) * A293207(7) = -4 + (-i) * 1 = -4 - i, and a(7) = -4.
f(9) = f(8) + (i^8) * A293207(8) = -4 - i + (1) * 2 = -2 - i, and a(8) = -2.
f(10) = f(9) + (i^9) * A293207(9) = -2 - i + (i) * 3 = -2 + 2*i, and a(9) = -2.
f(11) = f(10) + (i^10) * A293207(10) = -2 + 2*i + (-1) * 1 = -3 + 2*i, and a(10) = -3.
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
sign,look
AUTHOR
Rémy Sigrist, Oct 02 2017
STATUS
approved