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A024956
a(n) = A024955(n+3)/7.
0
1, 1, 8, 15, 22, 78, 190, 400, 1051, 2535, 7456, 18453, 47188, 126687, 358191, 954794, 2455349, 6649728, 18661770, 50325066, 134032193, 366103529, 1031003534, 2817678326, 7634389540, 20930031893, 59436464774, 163683320620, 447761993141
OFFSET
1,3
CROSSREFS
Cf. A024955.
Sequence in context: A373511 A291747 A024734 * A105174 A338857 A126622
KEYWORD
nonn
EXTENSIONS
a(27) corrected by Sean A. Irvine, Jul 30 2019
STATUS
approved