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A081126
Duplicate of A018191.
0
1, 2, 5, 16, 53, 206, 817, 3620, 16361, 80218, 401501, 2139512, 11641885, 66599846, 388962953, 2367284236, 14700573137, 94523836850, 619674301621, 4186249123808, 28809504493061, 203556335785342, 1463877667140065
OFFSET
0,2
CROSSREFS
Sequence in context: A148398 A346518 A100442 * A018191 A006191 A149959
KEYWORD
dead
STATUS
approved