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A023664 Convolution of the lower and upper Wythoff sequences (A000201 and A001950). 0
2, 11, 30, 63, 117, 194, 298, 434, 604, 816, 1072, 1375, 1735, 2151, 2628, 3172, 3783, 4471, 5237, 6083, 7019, 8042, 9162, 10382, 11702, 13136, 14680, 16339, 18122, 20025, 22061, 24230, 26532, 28985, 31580, 34325, 37228, 40284, 43509, 46900 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

PROG

(PARI) a(n) = my(phi = (1+sqrt(5))/2); sum(k=1, n, floor(k*phi)*floor((n-k+1)*phi^2)); \\ Michel Marcus, Jun 10 2019

CROSSREFS

Cf. A000201, A001950.

Sequence in context: A062802 A103830 A162260 * A023622 A119438 A094005

Adjacent sequences:  A023661 A023662 A023663 * A023665 A023666 A023667

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Missing a(13) = 1735 inserted by Sean A. Irvine, Jun 09 2019

STATUS

approved

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Last modified August 14 01:55 EDT 2020. Contains 336476 sequences. (Running on oeis4.)