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 A176226 A symmetrical triangle sequence:q=5;t(n,m,q)=q^m + q^(n - m) - q^n 0
 1, 1, 1, 1, -15, 1, 1, -95, -95, 1, 1, -495, -575, -495, 1, 1, -2495, -2975, -2975, -2495, 1, 1, -12495, -14975, -15375, -14975, -12495, 1, 1, -62495, -74975, -77375, -77375, -74975, -62495, 1, 1, -312495, -374975, -387375, -389375, -387375, -374975 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Row sums are: {1, 2, -13, -188, -1563, -10938, -70313, -429688, -2539063, -14648438, -83007813,...}. LINKS FORMULA q=5;t(n,m,q)=q^m + q^(n - m) - q^n EXAMPLE {1}, {1, 1}, {1, -15, 1}, {1, -95, -95, 1}, {1, -495, -575, -495, 1}, {1, -2495, -2975, -2975, -2495, 1}, {1, -12495, -14975, -15375, -14975, -12495, 1}, {1, -62495, -74975, -77375, -77375, -74975, -62495, 1}, {1, -312495, -374975, -387375, -389375, -387375, -374975, -312495, 1}, {1, -1562495, -1874975, -1937375, -1949375, -1949375, -1937375, -1874975, -1562495, 1}, {1, -7812495, -9374975, -9687375, -9749375, -9759375, -9749375, -9687375, -9374975, -7812495, 1} MATHEMATICA t[n_, m_, q_] := q^m + q^(n - m) - q^n; Table[Flatten[Table[Table[t[n, m, q], {m, 0, n}], {n, 0, 10}]], {q, 1, 10}] CROSSREFS Sequence in context: A176286 A111805 A238754 * A155493 A156939 A174187 Adjacent sequences:  A176223 A176224 A176225 * A176227 A176228 A176229 KEYWORD sign,tabl,uned AUTHOR Roger L. Bagula, Apr 12 2010 STATUS approved

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Last modified October 20 07:33 EDT 2019. Contains 328252 sequences. (Running on oeis4.)