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 A274635 Square array read by antidiagonals: T(m,n) (m>=0, n>=0) = (2^floor(m/2)-1)*(2^ceiling(n/2)-1). 3
 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 3, 1, 3, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 7, 3, 9, 3, 7, 0, 0, 0, 7, 7, 9, 9, 7, 7, 0, 0, 0, 15, 7, 21, 9, 21, 7, 15, 0, 0, 0, 15, 15, 21, 21, 21, 21, 15, 15, 0, 0, 0, 31, 15, 45, 21, 49, 21, 45, 15, 31, 0, 0, 0, 31, 31, 45, 45, 49, 49, 45, 45, 31, 31, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,17 LINKS EXAMPLE The array begins: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... 0, 1, 1, 3, 3, 7, 7, 15, 15, 31, 31, 63, 63, ... 0, 1, 1, 3, 3, 7, 7, 15, 15, 31, 31, 63, 63, ... 0, 3, 3, 9, 9, 21, 21, 45, 45, 93, 93, 189, 189, ... 0, 3, 3, 9, 9, 21, 21, 45, 45, 93, 93, 189, 189, ... 0, 7, 7, 21, 21, 49, 49, 105, 105, 217, 217, 441, 441, ... ... CROSSREFS The main diagonal is A274230. Cf. A274636. Sequence in context: A300839 A143783 A179175 * A146524 A179656 A167274 Adjacent sequences:  A274632 A274633 A274634 * A274636 A274637 A274638 KEYWORD nonn,tabl AUTHOR N. J. A. Sloane, Jul 08 2016 STATUS approved

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Last modified December 7 09:33 EST 2019. Contains 329843 sequences. (Running on oeis4.)