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 A123002 Triangle read by rows: T(n, m) := 2^(n - 1)*(2*m - 1) - 2^(m - 1)*(2*n - 1). 0
 0, -1, 0, -1, 2, 0, 1, 10, 12, 0, 7, 30, 44, 40, 0, 21, 74, 116, 136, 112, 0, 51, 166, 268, 344, 368, 288, 0, 113, 354, 580, 776, 912, 928, 704, 0, 239, 734, 1212, 1656, 2032, 2272, 2240, 1664, 0, 493, 1498, 2484, 3432, 4304, 5024, 5440, 5248, 3840, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS From a problem on Peano mappings. REFERENCES S. M. Ulam, Problems in Modern Mathematics, John Wiley and Sons, New York, 1960, page 32. LINKS G. S. Stoller, Three problems of S. M. Ulam with solutions and generalizations, Colloquium Mathematicum 36 (1976), 43-48. EXAMPLE 0 -1, 0 -1, 2, 0 1, 10, 12, 0 7, 30, 44, 40, 0 21, 74, 116, 136, 112, 0 MATHEMATICA T[n_, m_] := 2^(n - 1)*(2*m - 1) - 2^(m - 1)*(2*n - 1); a = Table[Table[T[n, m], {m, 1, n}], {n, 1, 10}]; Flatten[a] CROSSREFS Sequence in context: A185410 A264676 A091803 * A261161 A137514 A322221 Adjacent sequences:  A122999 A123000 A123001 * A123003 A123004 A123005 KEYWORD sign,tabl AUTHOR Roger L. Bagula, Sep 23 2006 EXTENSIONS Edited by N. J. A. Sloane, Oct 01 2006 STATUS approved

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Last modified April 17 11:26 EDT 2021. Contains 343064 sequences. (Running on oeis4.)