A023664 Convolution of the lower and upper Wythoff sequences (A000201 and A001950).

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

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