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A306905 A306898(n)/2. 0
1, 4, 6, 16, 20, 48, 70, 160, 270, 560, 1034, 2160, 4108, 8344, 16440, 33088, 65552, 131688, 262162, 525440, 1048740, 2099240, 4194326, 8393184, 16777300, 33562672, 67109418, 134234464, 268435484, 536904960, 1073741854, 2147549824, 4294969404 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..33.

CROSSREFS

Cf. A306898.

Sequence in context: A302119 A120542 A132344 * A097970 A044858 A323043

Adjacent sequences:  A306902 A306903 A306904 * A306906 A306907 A306908

KEYWORD

nonn

AUTHOR

Michael De Vlieger and N. J. A. Sloane, Mar 15 2019

STATUS

approved

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Last modified November 16 22:20 EST 2019. Contains 329208 sequences. (Running on oeis4.)