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 A156074 A triangular sequence: t(n,m)=3 + Prime[n + 1] - Prime[m + 1] - Prime[n - m + 1]. 0
 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 4, 4, 4, 1, 1, 2, 4, 4, 2, 1, 1, 4, 4, 6, 4, 4, 1, 1, 2, 4, 4, 4, 4, 2, 1, 1, 4, 4, 6, 4, 6, 4, 4, 1, 1, 6, 8, 8, 8, 8, 8, 8, 6, 1, 1, 2, 6, 8, 6, 8, 6, 8, 6, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Row sums are: {1, 2, 4, 6, 14, 14, 24, 22, 34, 62, 54,...} LINKS FORMULA t(n,m)=3 + Prime[n + 1] - Prime[m + 1] - Prime[n - m + 1]. EXAMPLE {1}, {1, 1}, {1, 2, 1}, {1, 2, 2, 1}, {1, 4, 4, 4, 1}, {1, 2, 4, 4, 2, 1}, {1, 4, 4, 6, 4, 4, 1}, {1, 2, 4, 4, 4, 4, 2, 1}, {1, 4, 4, 6, 4, 6, 4, 4, 1}, {1, 6, 8, 8, 8, 8, 8, 8, 6, 1}, {1, 2, 6, 8, 6, 8, 6, 8, 6, 2, 1} MATHEMATICA t[n_, m_] = 3 + Prime[n + 1] - Prime[m + 1] - Prime[n - m + 1]; Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}]; Flatten[%] CROSSREFS Sequence in context: A101566 A176653 A174842 * A051287 A278218 A216031 Adjacent sequences:  A156071 A156072 A156073 * A156075 A156076 A156077 KEYWORD nonn,tabl,uned AUTHOR Roger L. Bagula, Feb 03 2009 STATUS approved

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Last modified January 18 13:59 EST 2019. Contains 319271 sequences. (Running on oeis4.)