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A297192
Left-hand half of triangle A297191.
2
1, 1, 3, 1, 7, 13, 1, 11, 41, 63, 1, 15, 85, 231, 321, 1, 19, 145, 575, 1289, 1683, 1, 23, 221, 1159, 3649, 7183, 8989, 1, 27, 313, 2047, 8361, 22363, 40081, 48639, 1, 31, 421, 3303, 16641, 56695, 134245, 224143, 265729, 1, 35, 545, 4991, 29961, 124515, 369305
OFFSET
0,3
PROG
(PARI) See Links section.
CROSSREFS
Sequence in context: A249401 A196845 A263446 * A218592 A113647 A370381
KEYWORD
nonn,tabl,easy
AUTHOR
N. J. A. Sloane, Jan 10 2018
EXTENSIONS
More terms from Rémy Sigrist, Jan 19 2018
STATUS
approved